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3 years ago

8

3 The ratio of boys to girls at the dance was 10 to 15. How many girls were at the dance if there were 60 boys at the dance? Ans

wer

2 answers:

BigorU [14]3 years ago

5 0

Answer:

60:90

Step-by-step explanation:

use cross multiplication :)))

Andrei [34K]3 years ago

3 0

Step-by-step explanation:

90 girls were at the dance

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Math problem, please help:)

alukav5142 [94]

3_/—- 5 i’m pretty sure

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3 years ago

Write an equivalent expression for 4(3a+7)+3 (2a+5) if a=5, is the the solution to both expressions the same

Levart [38]

<span>Alternative</span>
4(3*5+7)+3(2*5+5)=
4(22)+3(15)=
(4*22)+(3*15)=
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3 years ago

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Plzzzzzzz help it's due today

SSSSS [86.1K]

Answer:

dan - 42:7 / 6:1

mia - 48:6 / 8:1

Step-by-step explanation:

mia has the greater sleep to days ratio because she sleeps 8 hours a day, whereas, dan sleep 6 hours a day. as you can see, the ratios can be ordered from greatest to least making mia have the greater ratio.

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2 years ago

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Tyna simplified the expression 3x^3/12x^-2 to x/4. What was Tyna’s mistake?

Ksenya-84 [330]

We are given expression: $\frac{3x^3}{12x^{-2}}$ .

Tyna simplified the given expression to $\frac{x}{4}$ .

Explanation: In order to simplify $\frac{3x^3}{12x^{-2}}$ , Tyna need to simplify rational expression $\frac{3}{12}$ .

On dividing top and bottom by 3, we get $\frac{1}{4}$ .

Which Tyna got correct.

Now she need to simplify $\frac{x^3}{x^{-2}}$ .

<em>On applying quotient rule of exponents, we need to subtract the exponents of x's.</em>

So, it would be $\frac{x^3}{y^-{2}} = x^3-{-2} = x^{3+2} = x^5$ .

<h3>So, the final answer should be $\frac{x^5}{4}$ .</h3><h3>Therefore, Tyan forgot to add exponent to x.</h3><h3>The exponent of x should be 5.</h3>

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3 years ago

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Savannah and Sarah are planning on riding their bikes to a point located at 1100 ft from their house their bicycle tires have a

Molodets [167]

Answer:

323.2 revolutions (324 revolutions (rounded) )

Step-by-step explanation:

Savannah has to cover 1100 feet

Sarah has to cover 1100 feet

Now,

For Savannah:

diameter is 26 in, so radius will be 26/2 = 13 inches

Circumference (1 rev) = $2 \pi r = 2 \pi (13) = 81.68$

There are 12 inches in 1 feet, so distance to be covered in inches:

1100 * 12 = 13,200 inches

Number of revolutions = 13,200/81.68 = <u>161.6 revolutions</u>

For Sarah, it is the same so:

161.6 revolutions

Together:

161.6 + 161.6 = 323.2 revolutions to cover the whole distance (both)

Rounded, it is About 324 revolutions

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3 years ago