To determine a value of that allows the given system of equations to be solved by Cramer's method, we need to check if the determinant of the coefficient matrix is non-zero.
If the determinant is non-zero, Cramer's method can be used to find a unique solution. The coefficient matrix for the given system is:
| 1 (a - 1) 0 1 |
| (a - 2) -a 0 -2 |
| 1 (a - 1) a 1 |
| a (a - 1) (a + 4) 1 |
We can calculate the determinant of this matrix and set it equal to zero:
Det = 1 * (-a * (a + 4) - 1 * (a - 1) * 1) - (a - 1) * ((a - 1) * (a + 4) - a * 1)
= -a^2 - 4a - a + 1 - (a^2 - 2a + 1 - a)
= -a^2 - 4a + 1 - a^2 + 2a - 1 + a
= -2a^2 - 2a
To find the value of a that allows Cramer's method to be used, we set the determinant equal to zero:
-2a^2 - 2a = 0
Simplifying the equation:
a^2 + a = 0
Factoring out a common factor:
a(a + 1) = 0
Setting each factor equal to zero:
a = 0 or a + 1 = 0
So, the possible values of that allow Cramer's method to be used are a = 0 or a = -1.
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Which of these graphs shows a relationship that is NOT proportional?
Answer:
A
Step-by-step explanation:
The line on graph A isnt touching any intercepting lines, therefore it isn't proportional.
Answer:
It's B.For the linear to be proportional, it would have to go through the y-axis. It will always have to go through the y-axis.
To sum it up:You cannot find the slope if the line doesn't go through/start at the y-axis.
What are the 7 laws of exponents?
Answer:
1- Product of powers rule.
2- Quotient of powers rule.
3- Power of a power rule.
4- Power of a product rule.
5- Power of a quotient rule.
6- Zero power rule.
7- Negative exponent rule.
Step-by-step explanation:
Hope I helped! ^v^
What is (4/5) / (1/10)
The answer would be 8.
REMEMBER: Keep / Change / Flip
KEEP - 4/5
CHANGE - / to *
FLIP - 1/10 | 10/1
Now you have, 4/5 * 10/1. Just multiple across and you'll get 40/5. Now, divide 40 and 5 and you'll get your answer, 8.
\( \frac{ \frac{4}{5} }{ \frac{1}{10} } \)
\( \frac{4}{5} \div \frac{1}{10} \)
\( \frac{4}{5} \times \frac{10}{1} \)
\( \frac{40}{5} \)
\(8\)
Help me find the expressions that are equivalent ?
Answer:
3⁶
9³
Step-by-step explanation:
We know that,
⇒ \(a^{x} *a^{y} =a^{(x+y)}\\\)
⇒ \(\frac{a^x}{a^y} =a^{(x-y)}\)
⇒ \((a^x)^y=a^x^y\)
Let us solve it now.
3⁴ × 3²
3 ⁽ ⁴ ⁺ ² ⁾
3⁶ ⇒ 729
And let us find the value of each expression which are given as answers and find the expressions which are equivalent to 729 ( 3⁶ ).
3⁶ ⇒ 729 ( YES )9⁶ ⇒ 531,441 ( NO )9³ ⇒ 729 ( YES ) 3⁸ ⇒ 6,561 ( NO )9⁸ ⇒ 43,046,721 ( NO )Write the equation of the line that passes through the points ( 1 , − 6 ) (1,−6) and ( 8 , 9 ) (8,9). Put your answer in fully reduced point-slope form, unless it is a vertical or horizontal line.
Answer:
10-15. 5-9. 34-56 78-3
what is the potential energy of the water in a lake of surface area 10 square miles, average depth 40 ft, and elevation above the electrical generator of 600 ft?
The potential energy of the water in a lake is 57 trillion N × m, which is 57 trillion joules (J).
Gravitational potential energy applies in this situation. G P E = m g h is the formula for gravitational potential energy, where: mg stands for weight or mass times gravity (w). The height to which an object can fall before kinetic energy replaces potential energy is denoted by the symbol h. In the example of the lake, we first determine the amount of water using the equation for the volume of a typical cylinder in order to determine the weight of the cylinder: V cy l = π r²L , The weight density of the water per cubic foot, which is about 62 lb, can then be multiplied by this volume: W(water) = (Volume) (Density)
W (water) = (28,000,000 ft² ⋅ 40ft) ( 62 lb ÷ ft³ )
W (water) = 69,440,000,000 lb
To calculate the potential energy, multiply this weight by the height. GPE=mgh
GPE=Wh=(69,440,000,000lb)(600ft)
GPE=41,644,000,000,000ft⋅lb
matching the level of precision by rounding the response to two significant digits. 4.2X10¹³ft⋅lb , or 42 trillion ft-lb.
Because joules are measured in N × m units, multiply the result by fractional equivalencies. 42trillionft × lb × (4.45N ÷ lb) × (m ÷ 3.28ft)
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could someone help me with this?
Answer:
The correct answer is 4/-6 which gets me to the same answer as-4/6 which is -2/3.
Answer:
Step-by-step explanation:
-4/6 is equivalent to 4/-6
answer is option 3
The sum of Jane's age and Shell's ages is 37. Jane is 5 years older than Shell. How old is Jane? Ok
Answer:
21
Step-by-step explanation:
because jane is 5 years older and 16 + 5 eaquls 21i had mutiplule choice answers
URGENTLY NEED HELP!!!!!!!!
Answer:
x = 31.3°
Step-by-step explanation:
\(cos (A) = \frac{b^{2} + c^{2} - a^{2} }{2bc} \)
here a = 8 , b = 11 , c = 15
using the formula:
cos(x) = (11² + 15² - 8²) / ( 2 * 11 * 15)
cos(x) = \(\frac{47}{55} \)
x = \(cos^{-1} (\frac{47}{55} )\)
x = 31.3°
determine whether the formula is explict of recursice then find the first five terms of the sequence a n-2^a n -1+1 where a 1=3
The sequence type is a recursive function and the first five terms cannot be determined from the formula
How to determine the sequence typeFrom the question, we have the following parameters that can be used in our computation:
a(n-2)ᵃ⁽ⁿ ⁻ ¹⁾ + 1 where a1 = 3
The formula a(n-2)ᵃ⁽ⁿ ⁻ ¹⁾ + 1 is recursive because it defines the nth term in terms of the two previous terms a(n-2) and a(n-1).
To find the first five terms of the sequence, we can use the initial value a1=3 and the recursive formula.
So, we have
a1 = 3
a2 = a(0)ᵃ¹
The second term cannot be calculated because we do not have a(0)
This means that other terms cannot be calculated with the formula
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a sample of bacteria is decaying according to a half-life model. if the sample begins with 900 bacteria, and after 10 minutes there are 360 bacteria, after how many minutes will there be 40 bacteria remaining?
After 35 minutes there will be 40 bacteria remaining.
The process of a constant percentage rate decrease in an amount over time is referred to as "exponential decay." The formula to calculate exponential decay is given as, \(N_t=N_0\left(\frac{1}{2}\right)^{\frac{t}{t_{1/2}}}\). Here, Nt is the quantity after time t, N0 is the initial quantity, t1/2 is the half-life, and t is time.
For the first situation, Nt=360, N0=900, t=10 minutes. Therefore, substituting the given values get the value of t1/2. So,
\(\begin{aligned}360&=900\left(\frac{1}{2}\right)^{\frac{10}{t_{1/2}}} \\\frac{360}{900}&=\left(\frac{1}{2}\right)^{\frac{10}{t_{1/2}}}\\0.4&=\left(\frac{1}{2}\right)^{\frac{10}{t_{1/2}}}\\ \ln(0.4)&=\frac{10}{t_{1/2}}\ln(0.5)\\t_{1/2}&=10\times\frac{\ln(0.5)}{\ln(0.4)}\\&=7.6\end{aligned}\)
Now, for the second situation, Nt=40. We have to find the time at which there will be 40 bacteria remaining. Then,
\(\begin{aligned}40&=900\left(\frac{1}{2}\right)^{t/7.6}\\0.04&=\left(\frac{1}{2}\right)^{t/7.6}\\\ln(0.04)&=\frac{t}{7.6}\ln(0.5)\\t&=7.6\times\frac{\ln(0.04)}{\ln(0.5)}\\&=7.6\times4.64\\&=35.26\\&\approx35\end{aligned}\)
The answer is 35 minutes.
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Find the slope of a line that passes through the points (-2,6) and (8, 4)
In order to calculate the slope of a line that passes through the points (-2, 6) and (8, 4), we can use the formula:
\(m=\frac{y_2-y_1}{x_2-x_1}\)Where (x1, y1) and (x2, y2) are the points coordinates. So we have:
\(\begin{gathered} m=\frac{4-6}{8-(-2)} \\ m=\frac{-2}{8+2} \\ m=\frac{-2}{10} \\ m=-\frac{1}{5} \end{gathered}\)So the slope of the line is -1/5.
Select the correct answer.
A baker uses square prisms for her cake boxes. Due to the number of layers in her cakes, she needs the height of each box to be 5.5 inches. In order to have enough space around the cake for icing and decorations, the volume of each box must be 352 cubic inches. The baker found that the equation below can be used to find the side length, x, of the box to fit her cakes.
Which statement best describes the solutions to this equation?
The solutions are -16 and 16 which are both reasonable side lengths.
The solutions are -16 and 16, but only 16 is a reasonable side length.
The solutions are -8 and 8 which are both reasonable side lengths.
The solutions are -8 and 8, but only 8 is a reasonable side length.
The only reasonable side length is x = 8 is "The solutions are -8 and 8, but only 8 is a reasonable side length."
The equation provided and evaluate the solutions in the context of the problem.
The equation mentioned in the problem is not explicitly provided, so we'll proceed with the given information.
Let's assume the side length of the square prism cake box is x.
The volume of a square prism can be calculated using the formula:
Volume = Length × Width × Height
Since the cake box is a square prism, the length and width are the same, so we can write:
Volume = x × x × 5.5
Given that the volume of each box must be 352 cubic inches, we can set up the equation:
x^2 × 5.5 = 352
Now, let's solve this equation to find the possible solutions for x:
x^2 = 352 / 5.5
x^2 ≈ 64
Taking the square root of both sides, we have:
x ≈ ±8
The solutions to the equation are -8 and 8.
Since we are dealing with a physical length, a negative side length doesn't make sense in this context.
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Sam did a two-sample t test of the hypotheses H0: u1=u2 versus HA: u1 not euqal u2 using samples sizes of n1 = n2 = 15. The P-value for the test was 0.08, and α was 0.05. It happened that bar(y1) was less than bar(y2). Unbeknownst to Sam, Linda was interested in the same data. However, Linda had reason to believe, based on an earlier study of which Sam was not aware, that either u1 = u2 or else u1 < u2. Thus, Linda did a test of the hypotheses H0: u1 = u2 versus HA: u1 < u2. Which of the following statements are true for Linda’s test? the P-value would still be 0.08 and H0 would not be rejected if α = 0.05 the P-value would still be 0.08 and H0 would be rejected if α = 0.05 the P-value would be less than 0.08 and H0 would not be rejected if α = 0.05. the P-value would be less than 0.08 and H0 would be rejected if α = 0.05. the P-value would be larger than 0.08 and H0 would be rejected if α = 0.05. the P-value would be larger than 0.08 and H0 would not be rejected if α = 0.05.
The correct statement for Linda's test is: the P-value would be less than 0.08, and H0 would be rejected if α = 0.05.
For Linda's test, she is testing the hypothesis that u1 < u2. Since Linda had reason to believe that either u1 = u2 or u1 < u2 based on an earlier study, her alternative hypothesis is one-sided.
Given that Sam's two-sample t test resulted in a P-value of 0.08 for the two-sided alternative hypothesis, we need to consider how Linda's one-sided alternative hypothesis will affect the P-value.
When switching from a two-sided alternative hypothesis to a one-sided alternative hypothesis, the P-value is divided by 2. This is because we are only interested in one tail of the distribution.
Therefore, for Linda's test, the P-value would be 0.08 divided by 2, which is 0.04. This means the P-value for Linda's test is smaller than 0.08.
Now, considering the significance level α = 0.05, if the P-value is less than α, we reject the null hypothesis H0. In this case, since the P-value is 0.04, which is less than α = 0.05, Linda would reject the null hypothesis H0: u1 = u2 in favor of the alternative hypothesis HA: u1 < u2.
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what is the equation of a line that is perpendicular to the line y=2x+1 and passes through the point (4,6).
i need help asap! work shown to help me thru the steps. y=mx+b
keeping in mind that perpendicular lines have negative reciprocal slopes, let's check for the slope of the equation above
\(y=\stackrel{\stackrel{m}{\downarrow }}{2}x+1\qquad \impliedby \qquad \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array} \\\\[-0.35em] ~\dotfill\)
\(\stackrel{~\hspace{5em}\textit{perpendicular lines have \underline{negative reciprocal} slopes}~\hspace{5em}} {\stackrel{slope}{2\implies \cfrac{2}{1}} ~\hfill \stackrel{reciprocal}{\cfrac{1}{2}} ~\hfill \stackrel{negative~reciprocal}{-\cfrac{1}{2}}}\)
so we're really looking for the equation of a line with a slope of -1/2 and that it passes through (4 , 6)
\((\stackrel{x_1}{4}~,~\stackrel{y_1}{6})\hspace{10em} \stackrel{slope}{m} ~=~ - \cfrac{1}{2} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{6}=\stackrel{m}{- \cfrac{1}{2}}(x-\stackrel{x_1}{4}) \\\\\\ y-6=- \cfrac{1}{2}x+2\implies {\Large \begin{array}{llll} y=- \cfrac{1}{2}x+8 \end{array}}\)
PLEASE HELP!!!!! THIS IS DUE SOON!!!!!!
Answer:
10.
tan x=51/68
x=tan-¹(51/68)=36.87
11.
cos x=72/78
x=cos-¹(72/78)=22.62
12.
sin x=24/51
x=sin-¹(24/51)=28.07
13.
sin x=21/75
x=sin-¹(21/75)=16.26
14.
sinx =16/85
x=sin-¹(16/85)=10.85
15.
sin x=48/60
x=sin-¹(48/60)=53.13
note
relationship between base and perpendicular is given by tan angle
relationship between base and hypotenuse is given by cos angle
relationship between hypotenuse and perpendicular is given by sin angle
Select the correct answer.
Answer:
D. \(3\sqrt{22b}\)
I hope this helps!
In inferential statistics, the objective is to determine how probable it is that:
The alternative hypothesis is true.
The null hypothesis is true.
The alternative hypothesis is false.
The null hypothesis is false.
In inferential statistics, the objective is to determine the probability of the alternative hypothesis being true or the null hypothesis being true.
This involves using sample data to make inferences and draw conclusions about a larger population. By analyzing the data and performing statistical tests, we assess the likelihood of the alternative hypothesis or the null hypothesis being accurate.
The alternative hypothesis represents a claim or statement that contradicts the null hypothesis and suggests that there is a significant relationship or difference between variables. To determine its probability, statistical methods such as hypothesis testing and p-values are employed. These methods evaluate the strength of evidence against the null hypothesis and support the alternative hypothesis when the evidence is substantial.
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find all solutions of the recurrence relation an = 2an−1 2n2. b) find the solution of
The solution to the recurrence relation is: aₙ = a(1)ⁿ + b * n * (1)ⁿ
= a + bⁿ
The solution to the recurrence relation with initial condition of a₁ = 2 is: aₙ = 2
How to Solve Recurrence Relations?A recurrence relation is defined as an equation that recursively defines a sequence in which the next term is a function of the previous term.
The given recurrence relation is:
aₙ = 2aₙ₋₁ - aₙ₋₂
n ≥ 2
a₀ = a₁ = 2
Rewrite the recurrence relation to get:
aₙ - 2aₙ₋₁ + aₙ₋₂ = 0
Now form the characteristic equation:
x² − 2x + 1 = 0
x = 1
We therefore know that the solution to the recurrence relation will have the form:
aₙ = a(1)ⁿ + b * n * (1)ⁿ
= a + bⁿ
To find a and b , plug in n = 0 and n = 1 to get a system of two equations with two unknowns:
2 = a + b*0
2 = a
2 = a + b*1
2 = a + b
Thus:
a = 2 and b = 0
aₙ = 2 + 0 * n = 2
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Complete question is:
a) Find all solutions of the recurrence relation aₙ = 2aₙ₋₁ - aₙ₋₂.
b. find the solution of the recurrence relation in part (a) with initial condition a₁ = 2
Business analysts claim that, after breaking -even (reaching a point of no profit and no loss ), a 1 0/0 increase in sales will increase net profit by 5%. However , during the last financial year many companies that broke -even and showed more than a 1% increase in sales also recorded a decrease in net profits .
Which of the following conclusions can be made from the above information ?
A.When a company breaks -even , sales are likely to increase by at least 1%.
B.The business analysts failed to consider other factors that influence the profitability of a company.
C.The last financial year is not representative of the profit potential for companies that break even .
DSales are the most important , but not the only, factor that decides a company's profitability .
B. The business analysts failed to consider other factors that influence the profitability of a company.
The following conclusion can be made from the above information: B. The business analysts failed to consider other factors that influence the profitability of a company.What is the break-even point?Break-even point is that level of sales at which a company will make zero profits, so it must sell enough to cover its costs.
The break-even point is the point at which total revenue is equal to total expenses. It’s the stage where a company makes neither a profit nor a loss; all costs are covered. When a company breaks even, it signifies that it has reached a point of no profit and no loss.Business analysts claim that, after breaking-even, a 10/0 increase in sales will increase net profit by 5%.
However, many firms that broke even and demonstrated more than a 1% increase in sales also experienced a decline in net profits during the last financial year. This implies that the business analysts failed to consider other factors that contribute to the profitability of a business.
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6+m/2 = -3
Help me pleAseeee
Answer:
m = -18
Step-by-step explanation:
6 + m/2 = -3
Subtract 6 from each side
6 + m/2 -6 = -3-6
m/2 = -9
Multiply each side by 2
m/2 * 2 = -9*2
m = -18
\(\huge\text{Hey there!}\)
\(\huge\boxed{\mathsf{6+ \dfrac{m}{2}=-3}}}\\\huge\boxed{\rightarrow\mathsf{6 + \dfrac{1}{2}m = -3}}\)
\(\huge\boxed{\rightarrow \mathsf{\dfrac{1}{2}m+ 6 = -3}}\\\\\huge\boxed{\text{SUBTRACT 6 to BOTH SIDES}}\\\huge\boxed{\mathsf{\dfrac{1}{2}m + 6 - 6 = -3 + 3}}\)
\(\huge\boxed{\mathsf{\dfrac{1}{2}m = -9}}\)
\(\huge\boxed{\text{MULTIPLY 2 to BOTH SIDES}}\)
\(\huge\boxed{\mathsf{\dfrac{1}{2}m \times 2 = 2 \times -9}}\)
\(\huge\boxed{\mathsf{m = 2\times-9}}\\\huge\boxed{\mathsf{2\times-9 = m}}\\\huge\boxed{\mathsf{2\times-9 = \bf -18}}\\\\\huge\boxed{\textsf{Therefore, your answer: \bf -18}}\huge\checkmark\)
\(\huge\text{Good luck on your assignment \& enjoy your day!}\)
~\(\huge\boxed{\frak{Amphitrite1040:)}}\)
Matt wants to start zip line 16 feet high in one tree and end 10 feet high in the other tree is the difference in height sufficient to meet the slope constraint? Use specific numbers from the situation to justify or refute whether Matt’s design meets the slope constraint
There is no difference in height that is not sufficient to meet the slope constraint if Matt wants to start a zip line 16 feet high in one tree and end 10 feet high in the other tree is the difference in height sufficient to meet the slope constraint.
What is the slope?The ratio that y increase as x increases is the slope of a line. The slope of a line reflects how steep it is, but how much y increases as x increases. Anywhere on the line, the slope stays unchanged (the same).
We know the slope can be evaluated using:
\(\rm Slope = \frac{Change \ in \ y \ axis}{Change \ in \ x \ axis}\)
Change in y-axis = difference in height
Change in y-axis = 16 - 10
= 10 feet
Change in x-axis = distance between tress
Since the data is not given.
So, the height difference is insufficient to keep the slope constraint.
Thus, there is no difference in height that is not sufficient to meet the slope constraint if Matt wants to start a zip line 16 feet high in one tree and end 10 feet high in the other tree is the difference in height sufficient to meet the slope constraint.
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A website begins its first week with 3 subscribers. The number of subscribers each week is listed in the table. Write an expression to model the number of subscribers at the website each week. Use your expression to determine the number of subscribers in week 24.
There are _____
subscribers in week 24.
Answer:
72
Step-by-step explanation:
This is clearly multiplication so all you have to do is multiply 24 x 3 and your answer is There are 72 subscribers in week 24
If (a,b) and (c,d) are solutions of the system x^ 2-y=1&x+y=56, the a+b+c+d=
The solutions for the system are
Solution 1: (a, b) = (5, 51)
Solution 2: (c, d) = (-11, 67)
To find the value of a + b + c + d, we need to first determine the values of a, b, c, and d by solving the given system of equations:
Equation 1: x^2 - y = 1
Equation 2: x + y = 56
Let's solve the system to find the values of x and y:
From Equation 2, we can isolate y by subtracting x from both sides:
y = 56 - x
Substituting this value of y into Equation 1:
x^2 - (56 - x) = 1
x^2 - 56 + x = 1
x^2 + x - 55 = 0
Now we can factor the quadratic equation:
(x - 5)(x + 11) = 0
So we have two possible values for x:
x - 5 = 0, which gives x = 5
x + 11 = 0, which gives x = -11
For x = 5, we can substitute it back into Equation 2 to find y:
5 + y = 56
y = 51
For x = -11, we can substitute it back into Equation 2 to find y:
-11 + y = 56
y = 67
Therefore, the solutions for the system are:
Solution 1: (a, b) = (5, 51)
Solution 2: (c, d) = (-11, 67)
Finally, we can calculate a + b + c + d:
a + b + c + d = 5 + 51 + (-11) + 67
a + b + c + d = 112
Hence, the value of a + b + c + d is 112.
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how many faces, edges and vertices does a cone have
Answer:
2 faces, 0 edges, and 0 vertices
Step-by-step explanation:
Find the slope of the line that passes through the two points. (3, 4) and (5, 7)
Answer:
what
Step-by-step explanation:
Answer: The answer is \(\frac{7-5}{4-3}\) = \(\frac{2}{1}\)=2
The formula to solve down here:
(x1,y1)
(x2,y2)
Step-by-step explanation:
when an item is marked up by a certain percent and then marked down by the same percent, is the sale price equal to the price before the markup and markdown?
Answer: yes it is
Step-by-step explanation:
IGNORE EVERYTHING BUT THE EQUATION WHOEVER ANSWERS FIRST GETS BRAINIEST ANSWER
Answer:
−35.948187
Step-by-step explanation:
Is the following statement true, false, or open: 60 – 45 = 25?
A. true
B. false
C. open
D. none of the above
Find all possible values of x for which these two triangles are similar. 1 x + 10° 2x - 50° o TAT The only possible values of x are 4 and
we know that
If two triangles are similar, then their corresponding angles are congruent
In this problem
we have that
First case
angle x and angle 60 are corresponding angles
angle (x+10) and angle (2x-50) are corresponding angles
so
x=60
x+10=2x-50
2x-x=10+50
x=60
is ok
Second case
angle (x+10) and angle 60 are corresponding angles
angle x and angle (2x-50) are corresponding angles
so
x+10=60
x=50
x=2x-50
2x-x=50
x=50
therefore
the possibles values of x are 50 degrees and 60 degrees