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3 years ago

1.Explain how to find equivalent fractions for 9/12 2.Explain how to simplify 16/24

Mathematics

1 answer:

krok68 [10]3 years ago

4 0

1. 9/12 divide top and bottom by 3

3/4

now you can multiply the top and bottom by the same number and get an equivalent fraction

3/4 * 2/2 = 6/8

3/4 * 5/5 = 15/20

these are all equivalent fractions to 9/12 = 3/4 = 6/8 = 15/20

2. 16/24

divide the top and bottom by 8

2/3

This is as small as it goes (keep dividing until there is no number that will go into the top and the bottom evenly).

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Answer:

Multiply the numbers then Add on both sides then simplify

Step-by-step explanation:

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3 years ago

A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a

laila [671]

Complete Question

A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a margin of error of ±5% with 90% confidence, and we do not have any prior knowledge about the proportion who might support the law. How many people need to be included in the sample?

Round your answer up to the nearest integer.

sample size = _____

Answer:

The sample size is $n = 271$

Step-by-step explanation:

From the question we are told that

The margin of error is E = 5% = 0.05

Generally given that there was no prior knowledge about the proportion of who might support the law, we will assume the sample proportion to be

$\^ p = 0.5$

From the question we are told the confidence level is 90% , hence the level of significance is

$\alpha = (100 - 90 ) \%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.645$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )$

=> $n = [\frac{1.645 }{0.05} ]^2 * 0.5 (1 - 0.5 )$

=> $n = 271$

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

How do u do this problem

atroni [7]

Alexis and 3 friends buy:
-Pretzel $4.
-Sauce $1
-Drink $2

First we would multiply all the food prices by 4, since there is 4 people in total.
4 x 4 = $16
1 x 4 = $4
2 x 4 = $8

Now we're adding all the prices together.
16 + 4 + 8 = $28

At this point, we're going to make the expression, using all the steps that we did.
( 4 x 4 ) + ( 1 x 4 ) + ( 2 x 4 )

We used parenthesis to show that those expressions need to be done first before anything else.

This is how we make an expression and we find the total answer.

The expression would be: ( 4 x 4 ) + ( 1 x 4 ) + ( 2 x 4 )
The total cost would be: $28

Hope this helps!~

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3 years ago