9.)Cici went shopping and spent a total of $45.28. She paid
with a $100 bill. How much change did she receive? Write an
expression and solve.

Answer:

is there an image or something to look at? we need one to give the answer

Step-by-step explanation:

Answer:

Step-by-step explanation:

The value of 12.10 x 5.6 closest to the whole number is 72.

To find the value of 12.10 x 5.6, we can first round each number to the nearest whole number. So 12.10 becomes 12 and 5.6 becomes 6. Then, we can multiply 12 by 6, which gives us 72. Therefore, the value of 12.10 x 5.6 closest to the whole number is 72. This method is called rounding and estimation and can be useful when you don't need an exact answer but rather a close approximation. It's important to note that if you need a more precise answer, you would need to use the actual decimal values and perform the multiplication.

The value of the multiplication 12.10 x 5.6 is closest to a whole number. To find the result, simply multiply the two numbers: 12.10 x 5.6 = 67.76. When rounding this value to the nearest whole number.

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The lengths of the third side of the triangles can be achieved by using the Pythagorean theorem, which says in a right triangle, the sum of the squares of the two shorter sides is equal to the square of the hypotenuse.

Three vertices make up the three-sided polygon known as a triangle. There is a point where the three sides are joined end to end.

A triangle's third side must always have a length that falls between (but not exactly equal to) the sum and difference of the other two sides. Consider the examples 2, 6, and 7 as an example. The third side length must therefore be greater than 4 and less than 8.

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Tom's pencil is longer than Ellen's pencil with (3x+10)cm

Subtraction is one of the four arithmetic operation along with addition, multiplication and division. Subtraction is an operation that represents removal of objects from a collection. For example, in the adjacent picture, there are 5 minus 2 peaches, this means that 5 peaches with 2 taken away, resulting in a total of 3 peaches.

Ellen's pencils length = 2x+15

Tom's pencil length = 5x+25

Tom's pencil will be longer than Ellen's with;

(5x + 25 ) - (2x+15)

= 5x + 25 -2x - 15

collect like terms

5x -2x +25-15

3x +10

therefore Tom's pencil is longer than Ellen's pencil with ( 3x+10) cm

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Answer:

You are correct. Remember: rise over run.

m = \(\frac{y2-y1}{x2-x1}\)

Answer:

\(\frac{y_2-y_1}{x_2-x_1}\)

Step-by-step explanation:

\(\frac{y_2-y_1}{x_2-x_1}\)

the 2 and 1 represent which number they are in a series of points. For example, if I were to have points (1,2) and (3,4)

4 would be \(y_2\) meaning it is the second y value

2 would be \(y_1\) meaning it's the first y value

Same goes for x

3 is \(x_2\)

1 is \(x_1\)

so the equation for slope is \(\frac{4-2}{3-1}\), or 1

The probability that both marbles are red is 0.33

The probability formula defines the likelihood of the happening of an event. It is the ratio of favorable outcomes to the total favorable outcomes.

P(A) = Number of favorable outcomes/ total no. of possible outcomes

We have the information from the question:

Total marbles are there in bag is = 6

Red Marbles = 2

Green Marbles = 2

Yellow Marbles = 2

To find the probability that both marbles are red.

Now, According to the question:

The probabilities that are desirable for our cases are:

P(RR) = 2/6 = 1/3 = 0.33

Hence, The probability that both marbles are red is 0.33

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Answer: Hello!

Add 3y  to both sides of the equation.  x=12+3y

Step-by-step explanation:

Mark me brainest please. Hope I helped! Hope you make an 100%

-Anna♥

Answer:

$2431.01

Step-by-step explanation:

2000×(1 + 0.05)^4 = 2431.0125

Answer:

\(r = \sqrt{ {(6 - 2)}^{2} + {(1 - ( - 3))}^{2} } \)

\(r = \sqrt{ {4}^{2} + {4}^{2} } = \sqrt{16 + 16} = \sqrt{32} \)

So the equation of the circle is

\( {(x - 2)}^{2} + {(y + 3)}^{2} = 32\)

Graphically estimating the age of the fossil with 18% of the original carbon-14 content involves determining the number of half-lives that have passed.  Therefore, the fossil is estimated to be between 11400 and 17100 years old.

Since the half-life of carbon-14 is 5700 years, we can divide the remaining carbon-14 content (18%) by the initial amount (100%) to obtain 0.18. Taking the logarithm base 2 of 0.18 gives us approximately -2.5146.

In the graph, we can plot the ratio of remaining carbon-14 to the initial amount on the y-axis, and the number of half-lives on the x-axis. The value of -2.5146 lies between -2 and -3 on the x-axis, indicating that the fossil is between 2 and 3 half-lives old.

Since each half-life is 5700 years, multiplying the number of half-lives by the half-life period gives us the age estimate.

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The rate of change of the area of the triangle is not constant and will depend on the angle between the ladder and the ground.

The area of the triangle formed by the ladder wall and ground is dependent on the angle between the ladder and the ground. The area of a triangle is equal to half the product of the length of the base and the corresponding height. Therefore, if the angle between the ladder and the ground changes, the corresponding height of the triangle will also change, resulting in a change of the area of the triangle. As the angle between the ladder and the ground changes, the rate of change of the area of the triangle will also change.

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Answer:

C

Step-by-step explanation:

between three and four

The association between lung function (FEV) and age can be observed through the analysis of the provided output from R.

The output from R likely includes statistical measures such as correlation coefficients or regression analysis results to determine the relationship between FEV and age. These calculations can help quantify the association between the two variables. For example, a correlation coefficient can indicate the strength and direction of the relationship, where a positive value suggests a positive association between FEV and age.

Based on the provided output from R, it can be concluded that there is an association between lung function (FEV) and age. However, without the actual output or specific statistical measures, it is challenging to provide further details or draw more precise conclusions. It is important to consider that the association between FEV and age may not necessarily imply causation, as other factors such as lifestyle, health conditions, and genetics can also impact lung function. Further analysis and additional data would be necessary to fully understand the nature and significance of this association.

Overall, it is reasonable to conjecture that lung function (FEV) changes with age, but a comprehensive analysis of the provided output and additional research would be required to establish the precise relationship between the two variables.

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The study has a confounding variable since the two groups differ in the time they were supposed to report to the testing room. Since the groups differed in terms of sleep deprivation and the time they were supposed to report to the testing room, the effect of sleep deprivation on learning could not be isolated.

The statement that is true is: d. All of these are true.Explanation:A study may have various sources of variability, including participant selection, the setting in which the study is conducted, and the measure used. The following options are as follows:a. The study may be affected by a situational variable.b. The construction noise may contribute to variability in test scores.c. The study has a confounding variable. The groups differ in the time they are to report to the testing room.d. All of these are true.Therefore, all of these options are true. For example, the study may be affected by a situational variable if a natural disaster or other unforeseen event happens that causes the study to be disrupted. In this case, the study was disrupted by a noisy construction crew, which may have contributed to variability in test scores. The study has a confounding variable since the two groups differ in the time they were supposed to report to the testing room. Since the groups differed in terms of sleep deprivation and the time they were supposed to report to the testing room, the effect of sleep deprivation on learning could not be isolated.

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The four inequalities that can be used to find the solution of 3 ≤ |x + 2| ≤ 6 is x + 2 ≤ 6, x + 2 ≥ -6, x + 2 ≥ 3 and x + 2 ≤ -3

An equation is an expression that shows the relationship between two or more variables and numbers.

Given the inequality:

3 ≤ |x + 2| ≤ 6

Hence:

x + 2 ≤ 6, -(x + 2) ≤ 6, 3 ≤ x + 2 and 3 ≤ -(x + 2)

This gives:

x + 2 ≤ 6, x + 2 ≥ -6, x + 2 ≥ 3 and x + 2 ≤ -3

The four inequalities that can be used to find the solution of 3 ≤ |x + 2| ≤ 6 is x + 2 ≤ 6, x + 2 ≥ -6, x + 2 ≥ 3 and x + 2 ≤ -3

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Answer :-

a) = Let cement, sand and stone in the concrete be x, 2x and 3x,

Each bag of dry concrete is 30 kg,

so,

x + 2x + 3x = 30

or, 6x = 30

so, x = 5

Now,

one bag contaings 2×5 = 10 kg of sand.

He buys just enough sand,stone and cement to make 50 bags of dry concrete,

1 bag = 10 kg sand

50 bags = 10 × 50 kg sand = 500 kg of sand

So,

He buys 500 kg of sand.

b) =

1 bag contains

5 kg of cement, 2×5 = 10 kg of sand and 3×5 = 15 kg of stone,

so,

25 kg of cement = 5.50 euro

5 × 50 kg of cement = 5.50/25 × 250 euro = 55 euro

20 kg of sand = 2 euro

500 kg of sand = 2/20 × 500 euro = 50 euro

15 kg of stone = 3.9 euro

15 × 50 kg = 3.9/15 × 750 euro = 195 euro

Total for 50 bags, he spent 50 + 195 + 55 euro = 300 euro.

He sold it for 396 euro.

His profit percent = (396 - 300)/300 × 100%

So, His profit percent = 32%.

With 1/4 of a yard of yarn, you can make approximately 160 brackets from 10 yards of yarn.

To determine the number of brackets you can make with 1/4 of a yard of yarn, we need to calculate how many times 1/4 yard can fit into 10 yards.

10 yards is equal to 40 quarters of a yard (since there are 4 quarters in a yard).

Now, we can divide 40 quarters by 1/4 to find the number of times it fits:

40 quarters ÷ 1/4 = 40 ÷ (1/4) = 40 × (4/1) = 160.

Therefore, with 1/4 of a yard of yarn, you can make 160 brackets using the given measurement of 10 yards of yarn.

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Answer:

B

Step-by-step explanation:

A. 30/70 = 3/7

B. 12/30 = 2/5

C. 9/21 = 3/7

D. 6/15 = 3/7

so the odd one is Option B

Answer: know side: 3

Unknown side: 5

Step-by-step explanation:

(a) Thus, the composition of the solid product is 70% CaO and 30% CaCO₃.(b) Therefore, the yield of CaO produced per kg of CO₂ produced is 70%.

(a) Process Schematic, In order to perform the calculation for the composition of solid products withdrawn from the kiln, we need to consider the given chemical equation and make some assumptions. Therefore, we can begin the calculation by considering the given chemical reaction.

CaCO₃ → CaO + CO₂

As we can see from the chemical equation, one mole of CaCO₃ will produce one mole of CaO. Thus, in one kiln, the reaction goes to 70% completion.

This means that 70% of the CaCO₃ will decompose to form CaO. In addition to this, the unreacted CaCO₃ will also be present in the solid product.

Based on the given information, we can assume that the total amount of CaCO₃ introduced into the kiln is one kilogram. Therefore, 70% of this will decompose to form CaO. The total amount of CaO produced will be 0.7 kilograms.

The amount of unreacted CaCO₃ will be 0.3 kilograms. Now we can calculate the percentage composition of the solid product as follows:CaO = (0.7/1) x 100% = 70%CaCO₃ = (0.3/1) x 100% = 30%

Thus, the composition of the solid product is 70% CaO and 30% CaCO₃.

(b) YieldThe yield of CaO produced per kg of CO₂ produced can be calculated using the following formula:Yield of CaO = (mass of CaO produced / mass of CO₂ produced) x 100%We can find the mass of CO₂ produced by considering the balanced chemical equation. CaCO₃ → CaO + CO₂

In this reaction, one mole of CaCO₃ will produce one mole of CO₂. Therefore, we can assume that one kilogram of CaCO₃ will produce one kilogram of CO₂.

Now we can calculate the mass of CaO produced. We know that 70% of the CaCO₃ will decompose to form CaO. Therefore, the mass of CaO produced will be:Mass of CaO produced = 0.7 kg

Now we can calculate the yield of CaO produced per kg of CO₂ produced: Yield of CaO = (mass of CaO produced / mass of CO₂ produced) x 100%Yield of CaO = (0.7 kg / 1 kg) x 100%Yield of CaO = 70%

Therefore, the yield of CaO produced per kg of CO₂ produced is 70%.

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Answer:

i am pretty sure it is   a) Both powers should be in the numerator with positive exponents.

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

Answer:

3.398

Step-by-step explanation:

log(10) 2500 = log(10) (5^2*10^2) = log(10) 5^2 + log(10) 10^2 = 2*log(10) 5 + 2=3.398

Answer:

8 years old

Step-by-step explanation:

Set Amy's age as x.

Kevin's age will be 2x, since he is two times as old as Amy.

Father's age will be 5x, since he is five times as old as Amy.

x + 2x + 5x = Sum of the ages = 64

x + 2x + 5x = 64

Combine like terms: 8x = 64.

Divide 8 on both sides: x = 8.

Amy's age = 8.

Hope this helps!

Answer:

The expression 3x + 10 can be written on the right hand side of the equation

Step-by-step explanation:

For the equation to have no solution, it must be that the terms in x is equal on both sides and also that the number term in both sides is unequal

If the number term is equal with the x term being same, then what we have is a set with infinite solution

So in this case, let us write the term on left fully

That would be;

3x + 3 + 9

= 3x + 12

So any term on the right should be 3x added to any other number other than + 12

So that could be;

3x + 10

Answer:Gigi Gigi

Step-by-step explanation:

can go to get my

However, we need to substitute a with s since that is the value we have calculated. Therefore, we get \(A(s) = (1/4)(5 + sqrt(5))s^2.\) This is the function notation that represents the area of a regular pentagon whose perimeter is 140 cm.

Let's consider that s be the length of a side of the regular pentagon.

The perimeter of the regular pentagon will be 5s. Therefore, we have the equation:5s = 140s = 28 cm

Also,

we have the formula for the area of a regular pentagon as:

\($A=\frac{1}{4}(5 +\sqrt{5})a^{2}$,\)

where a is the length of a side of the pentagon.

In order to represent the area of a regular pentagon whose perimeter is 140 cm, we need to substitute a with s, which we have already calculated.

Therefore, we have:\(A(s) = $\frac{1}{{4}(5 +\sqrt{5})s^{2}}$\)

Now, we have successfully used function notation (with the appropriate functions above) to represent the area of a regular pentagon whose perimeter is 140 cm.

The area of a regular pentagon can be represented using function notation (with the appropriate functions above). The first step is to calculate the length of a side of the regular pentagon by dividing the perimeter by 5, since there are 5 sides in a pentagon.

In this case, we are given that the perimeter is 140 cm, so we get 5s = 140, which simplifies to s = 28 cm. We can now use the formula for the area of a regular pentagon, which is\(A = (1/4)(5 + sqrt(5))a^2\), where a is the length of a side of the pentagon.

However, we need to substitute a with s since that is the value we have calculated. Therefore, we get\(A(s) = (1/4)(5 + sqrt(5))s^2.\) This is the function notation that represents the area of a regular pentagon whose perimeter is 140 cm.

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Sebastian, this is the solution to the first problem you uploaded:

Let's recall that the interior angles of a triangle add up to 180 degrees.

Then if E =

Answer: Let's solve this problem step by step.

First, let's assume the salaries of An and B to be 5x and 3x, respectively, where x is a common multiplier.

According to the given information, they save Rs. 2600 and Rs. 1800, respectively. Since savings come from the remaining portion of their incomes after spending, we can calculate their expenditures as follows:

For An:

Income of An = Salary of An + Savings of An

Income of An = 5x + 2600

For B:

Income of B = Salary of B + Savings of B

Income of B = 3x + 1800

Now, let's consider the proportion of their expenditures. It is given that the proportion of their expenditures is 9:5. So, we can write the following equation:

(Expenditure of An)/(Expenditure of B) = 9/5

Since expenditure is the complement of savings, we have:

[(Income of An - Savings of An)] / [(Income of B - Savings of B)] = 9/5

Substituting the previously derived expressions for income, we get:

[(5x + 2600 - 2600)] / [(3x + 1800 - 1800)] = 9/5

Simplifying the equation, we have:

5x / 3x = 9/5

Cross-multiplying, we get:

5 * 3x = 9 * 3x

15x = 27x

Subtracting 27x from both sides, we have:

0 = 12x

This implies that x = 0, which is not a valid solution. Therefore, there seems to be an error or inconsistency in the given information or equations. Please recheck the problem statement or provide additional information to help resolve the issue.

The median charge is $51. The median of a data set is also called the middle value.

Median is the value of the middle point in a data set. Here is how to find the median.

A sample of the paramedical fees:  $55, $49, $50, $45, $52, and $55. Find the median!

The number of the data is 6.

Let's sort the data form the smallest!

$45, $49, $50, $52, $55, $55

The middle part of the data is $50 and $52. The median is

($50 + $52)/2 = $102/2 = $51

Hence, the median of the data is $51.

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Answer:

false

Step-by-step explanation:

The statement "Construct validity ensures that the measure includes an adequate and representative set of items." is true because researchers can determine the extent to which a measure has construct validity and whether it includes an adequate and representative set of items.

Construct validity is established by accumulating evidence through various means. One way to establish construct validity is by examining the content of the measurement tool. This involves carefully selecting items that represent the construct of interest.

In mathematical terms, we can think of construct validity as a process of creating a mathematical model that accurately reflects the construct being measured. This model should include a comprehensive set of items that adequately represent the construct.

In practice, researchers employ statistical techniques such as factor analysis to examine the relationships between the items and the construct.

Construct validity also involves assessing the convergent and discriminant validity of the measure. Convergent validity refers to the degree to which different items measuring the same construct are positively related to each other.

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