The correct answer is (d) class 21. The next class day when both students will be absent is class 21.
To determine the next class day when both students will be absent, we need to find the least common multiple (LCM) of the number of days between their absences.
The first student misses class every 2 days, while the second student misses class every 7 days. We want to find the next occurrence when both students are absent, starting from the second day of class.
To find the LCM, we can list the multiples of each interval until we find a common multiple.
Multiples of 2 days: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20...
Multiples of 7 days: 7, 14, 21, 28, 35...
We can see that the first common multiple for both intervals is 14 days. This means that both students will be absent on the 14th day of class.
However, since they were both absent on the second day of class, we need to find the next occurrence after the 14th day.
The next class day when both students will be absent is the
14th day + 7 days = 21st day.
Therefore, the next class day when both students will be absent is class 21.
So, the correct answer is (d) class 21.
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a coin is flipped, then a 6-sided die is rolled. what is the probability of getting heads and an even number?
The probability of getting a head when a coin is flipped and the probability of getting an even number when a dice s rolled is 1/2.
What is probability?The probability is computed by dividing the total number of possible outcomes by the number of possible ways the event could occur. Probability and odds are two distinct ideas. Odds are calculated by dividing the likelihood of an event by the likelihood that it won't.For instance, there is only one way to receive a head and there are a total of two possible outcomes, hence the probability of flipping a coin and getting heads is 1 in 2. (a head or tail). P(heads) = 1/2 is what we write.So, the probability formula:
P(E) = Favourable events/Total events
Probability of getting heads:
P(E) = Favourable events/Total events
P(E) = 1/2
Probability of getting an even number:
P(E) = Favourable events/Total events
P(E) = 3/6
P(E) = 1/2
Therefore, the probability of getting a head when a coin is flipped and the probability of getting an even number when a dice s rolled is 1/2.
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which of these situations does not have quantities that combine to make 0.
A. In the morning, the temperature rises 30 degrees. in the evening, it falls by 30 degrees
B. Hikroko earns $20 working concessions at the football game. she earns $20 as as babysitter
C. A dolphin swims 20 feet straight down from the surface. it then rise 20 feet to reture to the surface
D. A hot air balloon rises 40 feet. it then drops 40 feet to the ground
Hurry please
Answer:
B. Hikroko earns $20 working concessions at the football game. she earns $20 as as babysitter
Step-by-step explanation:
also the person who keeps deleting all my answers i hope u break your back
Find the maximum and minimum values of the function for the polygonal convex set determined by the given system of
inequalities.
x+y>2
8x-2y< 16
4y <6x+8
f (x, y) = 4x+7y
Answer:
max: 72 at (4, 8)
min: 8 at (2, 0)
Step-by-step explanation:
The attached graph shows the solution set as a white area. The shaded areas are excluded from the solution set. The dashed boundary lines indicate those lines are not excluded from the set. The vertices of the polygon are (0, 2), (2, 0) and (4, 8).
The line f(x,y) = 0 is shown for reference. The maximum value of f(x,y) will be found at the vertex of the solution set that is farthest from this line. The minimum will be found at the vertex of the solution set that is closest to this line.
The maximum value of f(x, y) is 72 at (x, y) = (4, 8).
The minimum value of f(x, y) is 8 at (x, y) = (2, 0).
» A. Complete the second column that describes the
change in water level. Then complete the third
column that describes the final height of the water.
What do you notice about the second and third
columns?
Starting
Height of
Water
top of pool
Change
in Inches
of Water
Final
Height of
Water
3
2
2
+
0
=
O
1
2
+
1
0
fill line
-1
2
+
-2
=
0
-2
2
+
-3
-1
-3
bottom
of pool
2.
+
-4
FOCUS ON MATU DRACTICES
EB
Bi
Answer:
sorry ihave ni idea sorry sorry
Problem: Express the following numbers in standard form:
(i) 0.0000000000085 (ii) 0.00000000000942 (iii) 6020000000000000
(iv) 0.00000000837
(v) 31860000000
Answer:
(i) 8.5 × 10^-12
(ii) 9.42 × 10^-12
(iii) 602 × 10^15
(iv) 8.37 × 10^-9
(v) 3.186 × 10^10
Step-by-step explanation:
(i) 0.0000000000085
= 0.0000000000085 × 10^12/10^12
= 8.5/10^12
= 8.5 × 10^-12
(ii) 0.00000000000942
= 0.00000000000942 × 10^12/10^12
= 9.42/10^12
= 9.42 × 10^-12
(iii) 6020000000000000
= 602 × 10^15
(iv) 0.00000000837
= 0.00000000837 × 10^9/10^9
= 8.37/10^9
= 8.37 × 10^-9
(v) 31860000000
= 3.186 × 10^10
-TheUnknownScientist
help pls.preparing for my term exam
Jackie is making flower arrangements. She has 2 roses and 4 daisies. If Jackie
wants to make all the arrangements identical and have no flowers left over, what
is the greatest number of flower arrangements she can make?
pls help <3
Answer:
2
Step-by-step explanation:
she will have 2 arangments of one rose and two daisies.
Answer:
2
Step-by-step explanation:
group off the daisies and rose
2 Rose's
4 raises
in order to make it identical
group 1 consist of ( 1 rose and 2 daisies)
group 2 consist of (1 rose and 2 daises)
only 2 bouquets
Simplify the exponential expression.
x-2y
Answer:
I'm afraid that you cannot simplify this anymore.
Step-by-step explanation:
HELP!!
Also introduce each terms provided in option!
The error expression of |A - N| in the given problem is: Absolute Error
How to identify the mathematical error?The absolute error is gotten by subtracting the true value from the measured value. The answer is normally expressed as ± or with an absolute value sign. The absolute error equation is expressed as: Absolute error = |measured value - true value|
Relative error is defined as a measurement of error that depends on the absolute error of a measuring tool as well as a measured value. Relative error can thus be defined as a decimal or as a percentage.
Now, we are told that
A is an actual value.
N is near the value,
From the definition of absolute error, we can clearly state that |A - N| is known as absolute error.
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Using the equation y = 2/3x +5, find the slope of this equation.
Answer:
2/3
Step-by-step explanation:
The given equation is in the form ...
y = mx + b
The values of m and b in your equation are ...
slope = m = 2/3
y-intercept = b = 5
The slope of the line described by the given equation is 2/3.
Find the sum of f(x) and g(x) if f(x)=2x²+3x+4 and g(x)=x+3 a) 2x²+4x+1 b). 2x²+4x+7 c) 2x²+2x+7 d). 2x²+2x+1
A sum is an arithmetic calculation of one or more numbers. An addition of more than two numbers is often termed as summation.The formula for summation is, ∑. Option (B) is correct 2x²+4x+7.
The sum of f(x) and g(x) if f(x)=2x²+3x+4 and g(x)=x+3 can be found by substituting the values of f(x) and g(x) in the formula f(x) + g(x). Therefore, we have;f(x) + g(x) = (2x² + 3x + 4) + (x + 3)f(x) + g(x) = 2x² + 3x + x + 4 + 3f(x) + g(x) = 2x² + 4x + 7Therefore, the answer is option B; 2x²+4x+7.A sum is an arithmetic calculation of one or more numbers. An addition of more than two numbers is often termed as summation.The formula for summation is, ∑. The summation notation symbol (Sigma) appears as the symbol ∑, which is the Greek capital letter S.
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Solve:
x + y = 7
3x - 2y = 11
By using Substituting method.
\(\large\underline{\sf{Solution-}}\)
\(\sf \longmapsto x + y = 7 \: \: - - - (i)\)
\(\sf \longmapsto 3x - 2y = 11 \: \: - - - (ii)\)
By first equation,
\(\sf \longmapsto x + y = 7\)
\(\sf \longmapsto x = 7 - y\)
Now, we can find the original value of y.
\(\sf \longmapsto 3x - 2y = 11\)
\(\sf \longmapsto 3(7 - y) - 2y = 11\)
\(\sf \longmapsto 21 - 3y - 2y = 11\)
\(\sf \longmapsto 21 - 5y = 11\)
\(\sf \longmapsto - 5y = 11 - 21\)
\(\sf \longmapsto - 5y = - 10\)
\(\sf \longmapsto y = \dfrac{ - 10}{ - 5} \)
\(\sf \longmapsto y = 2\)
Now, we can find the original value of x.
\(\sf \longmapsto x + y = 7\)
\(\sf \longmapsto x + 2 = 7\)
\(\sf \longmapsto x = 7 - 2\)
\(\sf \longmapsto x = 5\)
Therefore, the values of x and y are 5 and 2 respectively.
Find an equation of the hyperbola that has foci at (- 13, 0) and (13, 0) and asymptotes y = 2/3 x; y = - 2/3 x
The equation of the hyperbolas is \(\frac{x^2}{117} -\frac{y^2}{52} =1\)
What are hyperbolas?Hyperbolas are symmetrical open curve that are formed when a circular cone intersects a plane.
The given parameters are:
Foci: (-13,0) and (13,0)Asymptotes: y = 2/3x, y = -2/3xThe equation of a hyperbola is represented as:
\(\frac{(x - h)^2}{a^2} -\frac{(y - k)^2}{b^2} =1\)
The hyperbola passes through the origin.
So, we have:
\(\frac{(x - 0)^2}{a^2} -\frac{(y - 0)^2}{b^2} =1\)
\(\frac{x^2}{a^2} -\frac{y^2}{b^2} =1\)
Also, from the asymptotes, we have:
\(\frac ba = \frac 23\)
Make b the subject
\(b= \frac 23a\)
From the foci, we have:
\(a^2 + b^2 = 13^2\)
Substitute \(b= \frac 23a\)
\(a^2 + (\frac 23a)^2 = 13^2\)
Evaluate the squares
\(a^2 + \frac 49a^2 = 13^2\)
Add the fractions
\(\frac {13}9a^2 = 13^2\)
Divide both sides by 13
\(\frac {1}9a^2 = 13\)
Multiply both sides by 9
\(a^2 = 117\)
Recall that:
\(b= \frac 23a\)
Square both sides
\(b^2 = \frac 49a^2\)
So, we have:
\(b^2 = \frac 49 \times 117\)
\(b^2 = 52\)
Recall that:
\(\frac{x^2}{a^2} -\frac{y^2}{b^2} =1\)
So, we have:
\(\frac{x^2}{117} -\frac{y^2}{52} =1\)
Hence, the equation of the hyperbolas is \(\frac{x^2}{117} -\frac{y^2}{52} =1\)
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In the diagram, ∠AOB and ∠COB form a linear pair. Which statement must be true about the angles?
A. ∠AOB and ∠COB are supplementary to each other.
B. ∠AOB and ∠COB are supplementary to the same angle.
C. ∠AOB and ∠COB are complementary to each other.
D. ∠AOB and ∠COB are complementary to the same angle.
Please give me a serious answer, and if you don't know what to answer then don't, please.
Answer:
\({{\underline{\textsf{\textbf{A. ∠AOB and ∠COB are supplementary to each other. }}}}}\)
Step-by-step explanation:
As in the question given that, ∠AOB and ∠COB are linear pair and being theses angles are supplements it will form 180°. Hence, option A is the correct ✔️
∠AOB and ∠COB forms a linear pair
∠AOB and ∠COB are supplementary to each other
Given :
In the diagram, ∠AOB and ∠COB form a linear pair.
∠AOB and ∠COB forms a straight line . the sum of angles in a straight line is 180 degrees.
When the sum of angles is equal to 180 degree then they are called as supplementary angles.
∠AOB and ∠COB form a linear pair.
\(<AOB +<COB =180\)
the sum of both the angles are equal to 180 degrees .
So, ∠AOB and ∠COB are supplementary to each other.
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Somebody help me with this
Answer:
D s>350000
Step-by-step explanation:
The difference in base salary is 7,000 (45,000-38,000). To earn an additional 7,000, sales must be at least 350,000.
350000 x.02 (2% commission) is 7,000
1.The angle of elevation of a jet plane from a point R on the ground is 60°. After a flight of
17 seconds, the angle of elevation changes
to 30°. If the jet plane is flying at a constant height of 1700√3 metres, find the speed of
the jet plane in km per hour.
(ans: 720km/hr)
Answer:
Diagram is not so perfect
OR = distance travelled by the jet plane.
Step-by-step explanation:
Let point J be the jet plane and OJ be the constant height at jet plane is flying and OR be the distance jet plane is travelling.
h =
\(1700 \sqrt{3} \)
Now,
From the figure i drew (1st)
taking 60 as reference angle,
tan60° = p/b
or,
\(tan60 = 1700 \sqrt{3} \div b\)
\(b \: = 1700 \sqrt{3} \div tan60\)
so, b = 1700m
inital distance = 1.7km(OR)
now,
tan 30 = p/b
\(tan30 = 1700 \sqrt{3} \div b \\ or \: b = 1700 \sqrt{3} \div tan30\)
so, b = 5100 m
so, final distance = 5.1 km(OR)
Now,
distance travelled = final distance - initial distance
distance travelled = 5.1 km - 1.7km
distance travlled = 3.4 km
Now,
time = 17 seconds
= 0.00472 hour.
Now,
speed = d/t
or, speed = 3.4/0.00472
so, speed = 720.3389km/hr
so, speed = 720 km/hr approximately
Bill paid $36 tax on a laptop that cost $450. What percent tax did Bill pay?
I neeed help fast !!!
Answer:
8/21 is the answer.good luck
Use the method for solving homogeneous equations to solve the following differential equation. Dx/dt = 4x² + 9t √6²+x² / 4tx
Ignoring lost solutions, if any, an implicit solution in the form F(t,x) = C is ___ =C, where C is an arbitrary constant. (Type an expression using x and t as the variables.)
The implicit solution to the given differential equation Dx/dt = 4x² + (9t/√(6²+x²)) / (4tx) using the method for solving homogeneous equations is F(t,x) = C, where C is an arbitrary constant.
To solve the given differential equation, we can separate the variables and integrate both sides. Rearranging the equation, we have:
(4tx) Dx = (4x² + (9t/√(6²+x²))) dt. Next, we integrate both sides. Integrating the left side with respect to x and the right side with respect to t, we get:
∫(4tx) Dx = ∫(4x² + (9t/√(6²+x²))) dt. Integrating both sides will result in a function F(t,x) on the left side and the integral on the right side. Since we are looking for an implicit solution in the form F(t,x) = C, we can write the equation as:
F(t,x) = C. cccThis represents the general solution to the given differential equation, where C is an arbitrary constant. The specific form of the function F(t,x) will depend on the integration process and the initial conditions, if provided.
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Evaluate using synthetic substitution
f(x) = 4x^2 -7
f(2) = 4*2^2 -7
= 16-7
=9
Don leaves home at 2pm. He drives 45 miles from home in the first hour. He stops for 90 minutes. He then drives home at an average speed of 15mph. Draw a distance-time graph to show Don's journey.
Brainliest if you want :)
Answer:
3pm-5pm-7.30pm
Step-by-step explanation:
Find the solution set. 9x^2+3x-2=0 separate the two values with with a comma.
Answer:
x = -2/3, 1/3
Step-by-step explanation:
Step 1: Factor
(3x + 2)(3x - 1) = 0
Step 2: Find roots
3x + 2 = 0
3x = -2
x = -2/3
3x - 1 = 0
3x = 1
x = 1/3
Answer:
Step-by-step explanation:
factor ; (3x-1)(3x+2)=0
then make both 3x-1 and 3x+2 equal to 0
(3x-1)=0 solve 3x+2=0
+ 1 +1 -2 -2
_______ _______
3x = 1 3x = -2
x =1/3 x= -2/3
check for to make sure both solutions work by plugging back into the equation
A water hose has a flow rate of 12 gallons per minute. How many minutes will it take to fill up a pool that holds 30 cubic feet of water. One cubic foot equals 7.48 gallons. Round to the nearest minute.
Answer:
19 minutes
Step-by-step explanation:
30 ft³ = 224.4 Gallons
224.4 gallons / 12 gallons/min
18.7 min
round -- 19 minutes
Bree sold 2 paintings for $95 each, 5 stone sculptures for $64 each, and 1 mini-bronze sculpture for $150 in the month of April. Bree doubled her sales in May. How much were her total sales in April and May?
Answer:
Total sale in month of May and April = $1980
Step-by-step explanation:
Sale in the month of April
= Total sale of paintings + Total sale of stone scripture + mini-bronze sculpture
= 2 * 95 + 5 * 64 + 1 *150
= $ 660
Sale in the month of May = 2 * sale in the month of April
Sale in the month of May = 2 * $660
Sale in the month of May = $1320
Total sale in month of May and April = 660 + 1320 = $1980
The price of a factory machine is R900000 but depreciates at 5% per annum. Calculate the depreciated value of the machine after 6 years if: 4.5.1 the depreciation is at simple interest rate. (3) 4.5.2 the depreciation is at compound interest rate. (3) 4.6 The rate of inflation is at 6% per annum compounded annually. Determine the price of the new machine in 4.5 after 6 years. Hence calculate how much extra needs to be paid if the machine in 4.5.2 is traded in.
So, if the machine in 4.5.2 is traded in, approximately R615,060 extra needs to be paid.
To calculate the depreciated value of the machine after 6 years, we can use both simple interest and compound interest.
4.5.1 Depreciation at simple interest rate:
The formula for simple interest is:
Depreciated value = Initial value - (Initial value * depreciation rate * time)
In this case, the initial value is R900,000, the depreciation rate is 5% (or 0.05), and the time is 6 years. Plugging in these values into the formula, we get:
Depreciated value = R900,000 - (R900,000 * 0.05 * 6) = R900,000 - R270,000 = R630,000
So, the depreciated value of the machine after 6 years, with simple interest depreciation, is R630,000.
4.5.2 Depreciation at compound interest rate:
The formula for compound interest is:
Depreciated value = Initial value * (1 - depreciation rate)^time
Again, the initial value is R900,000, the depreciation rate is 5% (or 0.05), and the time is 6 years. Plugging in these values into the formula, we get:
Depreciated value = R900,000 * (1 - 0.05)^6 = R900,000 * 0.95^6 ≈ R900,000 * 0.7351 ≈ R661,590
So, the depreciated value of the machine after 6 years, with compound interest depreciation, is approximately R661,590.
4.6 To determine the price of the new machine in 4.5 after 6 years, we need to take into account the rate of inflation, which is 6% compounded annually. This means that the price of the new machine will increase by 6% each year.
To calculate the price of the new machine, we can use the formula for compound interest:
New price = Initial price * (1 + inflation rate)^time
In this case, the initial price is R900,000, the inflation rate is 6% (or 0.06), and the time is 6 years. Plugging in these values into the formula, we get:
New price = R900,000 * (1 + 0.06)^6 ≈ R900,000 * 1.4185 ≈ R1,276,650
So, the price of the new machine after 6 years, with the 6% inflation rate, is approximately R1,276,650.
To calculate how much extra needs to be paid if the machine in 4.5.2 is traded in, we need to subtract the depreciated value of the machine in 4.5.2 from the price of the new machine.
Extra payment = Price of new machine - Depreciated value of machine in 4.5.2
Plugging in the values, we get:
Extra payment = R1,276,650 - R661,590 ≈ R615,060
So, if the machine in 4.5.2 is traded in, approximately R615,060 extra needs to be paid.
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1.) The following figures are congruent. What side corresponds to side CD?
a. Side WX
b. Side ZX
C. Side YZ
d. Side WY
Answer:
C Side ZX
Because ZX is a reflection of CD
Erica recently invested in gold that is growing in value 4% annually. She invested $4000 initially. Find the value of her investment after 6 years.
The value of Erica's investment after 6 years is approximately $4,939.05.
To find the value of Erica's investment after 6 years, we can use the compound interest formula. The formula for compound interest is given as:
A = P\((1 + r/n)^(nt)\)
Where:
A is the final amount or value of the investment.
P is the initial principal or investment amount.
r is the annual interest rate (as a decimal).
n is the number of times the interest is compounded per year.
t is the number of years.
In this case, Erica's initial investment is $4000, the annual interest rate is 4% (or 0.04 as a decimal), and the investment is growing annually. Therefore, we have:
P = $4000
r = 0.04
n = 1 (since the interest is compounded annually)
t = 6 years
Plugging these values into the compound interest formula, we can calculate the final value of the investment:
A = $4000(1 + \(0.04/1)^(1*6)\)
A = $4000(1 + 0.04)^6
A = $4000(1.04)^6
Evaluating this expression, we find:
A ≈ $4,939.05
Therefore, the value of Erica's investment after 6 years is approximately $4,939.05.
This calculation assumes that no additional investments or withdrawals were made during the 6-year period and that the interest rate remains constant at 4% per year.
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PLZ ANYONE HELP ME PLZ BEFORE THE HOLIDAY BREAK BEGINS!!!!!!!!!!!!!!
The Uber base fare is $1. There is a charge of $1.05 per mile. You also plan to give the
driver a $2 tip.
Task 1 Student Directions:
Part A: Write an expression to represent the amount of money need to take a taxi or take Uber.
(x = the number of miles.)
Taxi Expression: ____________________ Uber Expression: __________________
Part B: Complete the table to determine how much it will cost to go 12 miles, 20 miles and 50 miles.
Taxi Uber
Part C: Which mode of transportation is better, use information from the table to support your answer. BUT PLZ JUST DO THE PART B AND PART C ONLY THANKS.
Answer:
Part A. (Uber)$1 + $2 + 1.05x
(taxi)
Part B. (Uber)$15.60 (12mi) $24(20mi) $55.50(50mi)
(taxi)
Part C.
Step-by-step explanation:
Part B. Uber
12 miles: $1 + $2 + 1.05(12)
3+12.60
15.60
20 miles: $1 + $2 + 1.05(20)
3+21
24
50 miles: $1 + $2 + 1.05(50)
3+52.50
55.50
Part B. Taxi
Part C.
Figure ABCD has vertices A(1, 1), B(1, 4), C(4, 4), and D(4, 1).
What are the coordinates of the vertices of Figure A’B’C’D’ after a reflection across the line x = –2 and a translation 3 units up?
Drag numbers to complete the coordinates.
Numbers may be used once, more than once, or not at all.
Answer:
okay so what your going to do is going to plot the given cordinates on your graph. Then once your graph is complete your going to go graph what they said which is -2,3 because theres a x axis and y axis and -2 is ur x asis and 3 is ur y axis :)) hoped this helped!
Step-by-step explanation:
If the figure is reflected across the line x = –2 and a translation 3 units up, the new points is at A'(-5, 4), B'(-5, 7), C'(-8, 7) and D'(-8, 4).
What is transformation?
A transformation is a function f, usually with some geometrical underpinning, that maps a set X to itself, i.e. f: X → X.
Transformation is the movement of a point from its initial location to a new location. Types of transformation is reflection, translation, rotation and dilation.
Figure ABCD has vertices A(1, 1), B(1, 4), C(4, 4), and D(4, 1). If the figure is reflected across the line x = –2 and a translation 3 units up, the new points is at A'(-5, 4), B'(-5, 7), C'(-8, 7) and D'(-8, 4).
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What is the value of y?
Enter your answer in the box.
y =
It costs $12 a person to enter the state fair. In 2 hours there were 300 cars parked in the parking lot and 396 people who entered the fair.
How much money was collected during that time period?
Answer:
$4752 was collected during that time
Answer:
$4752 was made in the 2 hour time period.
Hope this helps :)
Step-by-step explanation:
12 * 396 = 4752