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kogti [31]
3 years ago
11

4 :8::y:30 find the value of y

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
7 0

Answer:

y = 15

Step-by-step explanation:

Given

4 : 8 = y : 30

Required

Find y

4 : 8 = y : 30

Express as fraction

4 / 8 = y /30

Multiply through by 30

30 * 4 / 8 = y /30* 30

30 * 4 / 8 = y

15 = y

y = 15

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Stephanie took a science exam that had two parts.
patriot [66]

Answer:

44 questions

Step-by-step explanation:

Part 1: She got 16 questions correct, which was 4/5 of the number of part 1 questions.

Let x = total number of questions in part 1

4/5x = 16

Divide both sides by 4/5

x = 16 ÷ 4/5

= 16 × 5/4

= 20

x = 20

There are 20 questions in part 1

She got 16 questions correct, which was 2/3 of the number of part 2 questions.

Let y = number of questions in part 2

2/3y = 16

Divide both sides by 2/3

y = 16 ÷ 2/3

= 16 × 3/2

= 24

y = 24

There are 24 questions in part 2

The total number of questions on Stephanie’s exam = part 1 + part 2

= 20 + 24

= 44 questions

8 0
3 years ago
Solve for m.<br> 7 = 21m
e-lub [12.9K]

Answer:

Divide both sides by 21.

7/21=21m/21

1/3=m

So, m is equal to 1/3.

3 0
3 years ago
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bagirrra123 [75]

Answer:

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Step-by-step explanation:

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3 years ago
X(z + 3) + 1 + 3 − y; use x = 6, y = −5, and z = 2
Stels [109]

Answer: 39

Step-by-step explanation:

x(z+3)+1+3-y

plug in the values given for each variable

6(2+3)+1+3-(-5)

use pemdas to solve

6(5)+1+3+5

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39

4 0
4 years ago
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klio [65]

Answer:

0

Step-by-step explanation:

Because y=mx+b where m=slope and b=y-intercept.

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3 years ago
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