All categories

2 years ago

What is the value of x in the equation 5x - y = 30, when y = 157

Mathematics

2 answers:

hodyreva [135]2 years ago

8 0

Answer:

37.4

Step-by-step explanation:

If you plug in 157, we get 5x-157=30. Then we will add 157 to both sides to get 5x=187 and then divide by 5 on both sides leaving x on one side and the answer on the other so, 187/5=37.4.

Hope this helps!!! PLZ MARK BRAINLIEST!!!

Alenkasestr [34]2 years ago

5 0

Answer:

x = 37.4

Step-by-step explanation:

You might be interested in

Rewrite this non statistical question as a statistical question how many brothers does paul have?

Alecsey [184]

How many brothers does everyone here have?

6 0

3 years ago

The probability of drawing a yellow or green marble out of a bag containing 3 blue, 2 green , 8 yellow , 4 red , and 3 orange ma

WINSTONCH [101]

Answer:

$\frac{10}{23}$

Step-by-step explanation:

add green and yellow which is 10 over the whole thing which is 23

5 0

2 years ago

Pls help me this is really hard

LekaFEV [45]

Answer:Find the area of square and then circle then take them away

Step-by-step explanation:

7 0

2 years ago

If you want to be 95% confident of estimating the population mean to within a sampling error of plus or minus3 and the standard

Aleksandr [31]

Answer:

The sample size required is at least 171

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.

What sample size is required?

A samle size of at least n is required, in which n is found when $M = 3, \sigma = 20$

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

$3 = 1.96*\frac{20}{\sqrt{n}}$

$3\sqrt{n} = 20*1.96$

$\sqrt{n} = \frac{20*1.96}{3}$

$(\sqrt{n})^{2} = (\frac{20*1.96}{3})^{2}$

$n = 170.7$

Rouding up

The sample size required is at least 171

5 0

2 years ago

Graph the following pair of quadratic functions and describe any similarities/differences observed in the graphs.

horsena [70]

Answer:

The answer is a. both open upward; h is wider than f

7 0

2 years ago

Read 2 more answers