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konstantin123 [22]
3 years ago
9

Rita earned 20 points on a quiz. She lost 5 points for poor penmanship , then earned 10 points of extra credit. What’s Rita’s fi

nal score on the quiz?
Mathematics
2 answers:
Marina CMI [18]3 years ago
6 0
20 - 5 is her score after losing points:

15

Now, 15 + 10 is her score after her extra points.

25 points

Hope this helps!
nasty-shy [4]3 years ago
3 0
First, let's subtract.
If Rita earned 20 points on the quiz, and then lost 5 for poor penmanship the equation will look like 20 - 5 = 15.
Then, if she earned 10 points for extra credit, we add 15 and 10 to get 25.

20 - 5 + 10 is what the equation should be.
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Sveta_85 [38]

Answer:

\huge\boxed{1000 \ \text{cm}^3}

Step-by-step explanation:

There are two ways we can solve this equation.

<h2>A) Using the formula provided</h2>

The formula provided states that the volume of a cube based on the area of one of it's faces will be a^{\frac{3}{2}}, a the area of one face. Since we know the area of one face, we can substitute that inside the equation.

100^{\frac{3}{2}}

It's important to note that when we have a number to a fraction power, it's the same as taking the denominator root of the base to the numerator power.

So - 100^{\frac{3}{2}} becomes \sqrt{100^3}

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Therefore, the volume of this cube will be 1000 \ \text{cm}^3

<h2>B) Using prior knowledge about cubes</h2>

We can additionally use prior knowledge to find the volume of this cube.

We know that the area of a square will be s^2, where s is the length of a side. We also know the formula to find the volume of a cube from it's side length is s^3.

Since we know that one face is 100, we can make an equation - s^2=100

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Now that we know the value of s, we can plug it into the volume formula, s^3.

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So the volume is 1000 \ \text{cm}^3.

Hope this helped!

4 0
3 years ago
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valina [46]

Step-by-step explanation:

In order to find Volume for a rectangle use the formula: L * W * H

2 1/4 * 3/4 * 1 1/4 = 2 7/64

A cube with the side lengths of 1/4:   1/4 * 1/4 * 1/4 = 1/64

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I'm not sure if this is right, but I hope that helps! :)

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eduard

Answer:

See below

Step-by-step explanation:

Not sure which answer it is because it did not translate well

(2 1/4 ) / (-2/3)    =   (9/4) / ( -2/3)  =  9/4   *  (-3/2)   = -27/8    <====maybe your answer is in there somewhere?

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