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3 years ago

Solve the proportion. Z/42= 25/70

Mathematics

2 answers:

Alona [7]3 years ago

7 0

Hey!

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~Cross Multiply

z/42 * 25/70 → 70z = 1050

~Divide 70 to both sides

70z/70 = 1050/70

~Simplify

z = 15

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Hence, the answer is $\Large\boxed{\mathsf{z~=~15}}$

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Hope This Helped! Good Luck!

marysya [2.9K]3 years ago

3 0

Answer:

z+15

Step-by-step explanation:

Cross multiply and divide. 70z = 42*25

Hope this helps!!

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3 years ago

Read 2 more answers

The faces on a number cube are labled 1,2,2,3,4, and 5the number cube is rolled 114 times how many times would you expect the nu

Mrac [35]

Given:

The faces on a number cube are labeled 1,2,2,3,4, and 5.

The number cube is rolled 114 times.

To find:

How many times would you expect the number 2 to appear?

Solution:

We have,

Total outcomes = 1,2,2,3,4, and 5.

Number of total outcomes = 6

Favorable outcomes = 2 and 2

Number of favorable outcomes = 2

The probability of getting 2 is:

$P(2)=\dfrac{\text{Number of favorable outcomes}}{\text{Number of total outcomes}}$

$P(2)=\dfrac{2}{6}$

$P(2)=\dfrac{1}{3}$

Now, the expected number of times when 2 to appear is:

$E(x)=114\times P(2)$

$E(x)=114\times \dfrac{1}{3}$

$E(x)=38$

Therefore, the expected number of times is 38.

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2 years ago