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2 years ago

What is the unknown fraction?

Mathematics

1 answer:

daser333 [38]2 years ago

4 0

Answer:

A. 31/100

Step-by-step explanation:

Change 3/10 to hundreds:

3/10 × 10/10 = 30/100

The denominator (the bottom number) must be 100.

61 - 30 is 31.

The missing number is 31/100. See image.

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mihalych1998 [28]

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Step-by-step explanation:

2x=17-3

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3 years ago

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3 years ago

Find the value of x and y that will make each quadrilateral a parallelogram.

Tatiana [17]

Answer:

the opposite Angles sum up to give 180

Step-by-step explanation:

3y +3y = 180

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if y = 30 the x = 55

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3 years ago

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A woman bought a dress at a discount of 16 2/3%. If the woman paid $32.50, what was the original price of the dress?

Anastaziya [24]

Let's let x equal the original price of the dress.

We know that 16.6666% is equal to 0.16666 in decimal form by dividing the percent by 100.

So we can set up the equation:

$x-0.16666x=32.50$

because we know the discount, and we know that the discount of the original price was subtracted from the original price.

So then let's simplify by taking out x, the common factor:

$x(1-0.16666)=32.50$

Then solve for x:

$x(0.83333)=32.50$

$\frac{x(0.83333)}{0.83333} =\frac{32.50}{0.83333}$

$x=39$

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3 years ago

Marta is solving the equation s=2πrh+2πr^2 for h. which should be the result?

Marta_Voda [28]

Answer: First option.

Step-by-step explanation:

Marta needs to subtract $2\pi r^2$ from both sides of the equation:

$s=2\pi rh+2\pi r^2$

$s- 2\pi r^2=2\pi rh+2\pi r^2- 2\pi r^2$

$s- 2\pi r^2=2\pi rh$

Now she needs to divide both sides of the equation by $2\pi r$ , then:

$h=\frac{s- 2\pi r^2}{2\pi r}$

Rewriting:

$h=\frac{s}{2\pi r}-\frac{2\pi r^2}{2\pi r}$

Simplifying, she should get:

$h=\frac{s}{2\pi r}-r$

This matches with the first option.

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4 years ago

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