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3 years ago

Can anyone Explain in words why these are equivalent expressions.

Mathematics

2 answers:

Ahat [919]3 years ago

8 0

Answer:

They are equivalent expressions because if you use distributive property and multiply 10*b, then multiply 10*4c, you get 10b+40c

Step-by-step explanation:

N76 [4]3 years ago

4 0

Answer:

The distributive property says that when there is a number outside of parenthesis, this means it should be distributed (or multiplied) to the values inside the parenthesis.

So in this situation, 10 x b = 10b

and 10 x 4c = 40 c

so 10(b + 4c) becomes 10b + 40c once the 10 is distributed within the parenthesis.

I hope this helps!

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omeli [17]

Answer:

Definition of Midpoint

Step-by-step explanation:

Since T is the midpoint then it is equadistant from R to T and T to S

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3 years ago

A committee of 3 is being formed randomly from the employees at a school: 5 administrators, 34 teachers, and 4 staff. What is th

pav-90 [236]

Answer:0.000810

Step-by-step explanation:

Given

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3 years ago

What is -1/6 times 1.2

Akimi4 [234]

Answer:

-0.2

Step-by-step explanation:

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3 0

3 years ago

Read 2 more answers

Increasing the sample size while keeping the same confidence level has what effect on the margin of error? A. Increases the marg

DiKsa [7]

Answer:

C. Decreases the margin of error and hence increases the precision

Step-by-step explanation:

If we select a sample by Simple Random Sampling in a population of “infinite” size (a population so large that we do not know its size exactly), then the margin of error is given by

$\bf E=\frac{ZS}{\sqrt{n}}$

where

Z = The Z-score corresponding to the confidence level

S = The estimated standard deviation of the population

n = the size of the sample.

As we can see, since n is in the denominator of the fraction and the numerator is kept constant, the larger the sample size the smaller the margin of error, so the correct choice is:

C. Decreases the margin of error and hence increases the precision

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3 years ago

What does 5/12+23/10=

Serhud [2]

Answer:

PEMDAS

(5/12) +(23/10)

5/12=0.42

23/10=2.3

0.42+2.3=2.72

2.72 is the correct answer

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3 years ago