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barxatty [35]
3 years ago
13

What is the solution to this equation -15x=90​

Mathematics
2 answers:
notsponge [240]3 years ago
4 0

Answer:

its 1000

Step-by-step explanation:

docker41 [41]3 years ago
3 0

Answer is provided in the image attached.

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If p varies directly with q, and p = 10 when q = 5, what is the value of p when q = 20
Inessa [10]
The value of p would be 40. This is because the ratio of p:q = 10:5. this could be simplify into p:q = 2:1. Applying the ratio p:20 = 2:1, P=40.
8 0
3 years ago
Unoccupied seats on flights cause airlines to lose revenue. Suppose a large airline wants to estimate its average number of unoc
Bingel [31]

Answer:

We need a sample size of at least 719

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:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

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

In which \sigma is the standard deviation of the population and n is the size of the sample.

How large a sample size is required to vary population mean within 0.30 seat of the sample mean with 95% confidence interval?

This is at least n, in which n is found when M = 0.3, \sigma = 4.103. So

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

0.3 = 1.96*\frac{4.103}{\sqrt{n}}

0.3\sqrt{n} = 1.96*4.103

\sqrt{n} = \frac{1.96*4.103}{0.3}

(\sqrt{n})^{2} = (\frac{1.96*4.103}{0.3})^{2}

n = 718.57

Rouding up

We need a sample size of at least 719

6 0
3 years ago
2L + 2W = 88<br> L = W + 12<br> What are the dimensions?
liraira [26]

Answer:the length of the rectangle is 28

The width of the rectangle is 16

Step-by-step explanation:

The given equations are set up to determine the dimensions of a rectangle. L represents the length of the rectangle. W represents the width of the rectangle. Let us label

2L + 2W = 88 as equation 1.

We would substitute L = W + 12 into equation 1, it becomes

2(W + 12) + 2W = 88

2W + 24 + 2W = 88

4W + 24 = 88

4W = 88 - 24 = 64

W = 64/4 = 16

Substituting W = 16 into L = W + 12, it becomes

L = 16 + 12 = 28

8 0
4 years ago
Can’t figure this problem out need help
anyanavicka [17]
The answer is a fraction 24 over 7 or 24/7
5 0
3 years ago
1, 1/5, 1/25,1/125 what’s the next number
Burka [1]

Answer:

1/625

Step-by-step explanation:

As you can tell, the order is going by 1/5 times the number of how many times it was done

5 0
4 years ago
Read 2 more answers
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