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3 years ago

Translate the sentence into an equation.

Mathematics

1 answer:

maks197457 [2]3 years ago

4 0

Answer:

9y+8=5

Step-by-step explanation:

1. "Times" means multiply and "and" means add

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Remember um<br> 1<br> Calculate the midpoint of the segment joining (6.3) and (10, 15).

Sav [38]

(8, 9) will be the midpoint of the segment.
You can find this by applying the formula
(x1 + x2)/2 , (y1 + y2)/2

5 0

3 years ago

Read 2 more answers

Need help on my qyiz

Evgesh-ka [11]

H is equal to 8
M is equal to 15.3

20-12= 8
9+6.3= 15.3

Hope this helped

4 0

3 years ago

In a certain country, the true probability of a baby being a girl is 0.474. Among the next nine randomly slected

Gekata [30.6K]

Answer:

1 - p(7 girls) = 1 - 0.483^7 = 0.9939

4 0

4 years ago

A marketing researcher wants to find a 96% confidence interval for the mean amount those visitors spend per person per day while

ki77a [65]

Answer:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

Step-by-step explanation:

Notation

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

$\sigma=12$ represent the population standard deviation

n represent the sample size

ME = 4 the margin of error desired

Solution to the problem

When we create a confidence interval for the mean the margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =4 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 96% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=1-0.96 =0.04$ . And in excel we can use this formula to find it:"=-NORM.INV(0.02;0;1)", and we got $z_{\alpha/2}=2.054$ , replacing into formula (b) we got:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

5 0

4 years ago

Suppose y varies directly as x and y = 20 when x = 8. What is the value ofy whenx = 12?

AnnZ [28]

Answer:

y = 30

Step-by-step explanation:

Use the direct variation equation, y = kx

Plug in 20 as y and 8 as x, then solve for k:

y = kx

20 = k(8)

2.5 = k

So, the equation is y = 2.5x

Plug in 12 as x, and solve for y:

y = 2.5x

y = 2.5(12)

y = 30

So, when x = 12, y = 30

7 0

3 years ago