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guapka [62]
3 years ago
8

3(6a) for a=3 please help

Mathematics
2 answers:
kirill115 [55]3 years ago
6 0

Answer:

54

Step-by-step explanation:

1. Substitute 3 as a

3(6(3)) or 3(6·3)

2. Multiply inside the parenthesis first

3(18)

3. Multiply 3·18

54

Delvig [45]3 years ago
3 0
Substitute the value of the variable into the equation and simplify.
54
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Step-by-step explanation:

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What is the reference angle of 255°?​
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Step-by-step explanation:

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3 years ago
5. a square with side length 8 inches
marta [7]
What’s the question tho?
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The travel-to-work time for residents in Ventura County is unknown. Assume the population variance is 39. How large should a sam
katen-ka-za [31]

Answer:

A sample size of 128 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, find the margin of error M as such

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How large should a sample be if the margin of error is 1 minute for a 93% confidence interval

We need a sample size of n, which is found when M = 1. We have that \sigma = \sqrt{39}. So

M = z*\frac{\sigma}{\sqrt{n}}

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\sqrt{n} = 1.81\sqrt{39}

(\sqrt{n})^2 = (1.81\sqrt{39})^2

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A sample size of 128 is needed.

7 0
3 years ago
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