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3 years ago

I am so lost help me

Mathematics

2 answers:

Vinil7 [7]3 years ago

6 0

The answer is 1,500 mL because 1 liter is in 1000 mL.

lilavasa [31]3 years ago

3 0

1 Liter = 1000 mL

so....

1.5 Liter = 1500 mL

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The sum of a number and 15 is 63 find the number

tatuchka [14]

Answer:

x = 48

Step-by-step explanation:

$x+15=63\\x=48$

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I think it's 25

Step-by-step explanation:

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SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is inter

Rama09 [41]

Answer:

The administrator should sample 968 students.

Step-by-step explanation:

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

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Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

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

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Standard deviation of 300.

This means that $n = 300$

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This is n for which M = 15. So

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

$15 = 1.555\frac{300}{\sqrt{n}}$

$15\sqrt{n} = 300*1.555$

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$\sqrt{n} = 20*1.555$

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$n = 967.2$

Rounding up:

The administrator should sample 968 students.

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3 years ago

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Answer:

x=1, y=2

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x + 7y = 15

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x + 7y = 15

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x+2y = 5

x +2(2) = 5

x +4 = 5

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x-4+4 = 5-4

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