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3 years ago

PLEASE HELP!! WILL GIVE BRAINIEST!!! Please solve #7 and #8.

Mathematics

2 answers:

lawyer [7]3 years ago

8 0

7)
slope = (1+3)/(-1+10) = 4/9

y = mx + b
1 = 4/9(-1) + b
b = 1 + 4/9
b = 13/9
equation
y = 4/9x + 13/9

answer is D.y = 4/9x + 13/9

8)
y = 3x - 3
perpendicular so slope = -1/3

passing thru (-7, 9)
equation
y - 9 = -1/3(x +7)

answer is D. y - 9 = -1/3(x +7)

sukhopar [10]3 years ago

3 0

The answer to 7 is:y = (4/9)x + (13/9).
The answer to 8 is B, I think.

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I need help wit one & two please help

seropon [69]

23 is less than 25 which means it's closer to 20, so you would round it down to 20. 1.75 is over 0.50, 1/2, so you would round it up to 2. If you multiply 2 and 20 you would get 40.

Number two gets the same explanation just with different numbers.

3 0

3 years ago

Marisa bought four bottles of water.Each bottle of water was 95 cents. Write an equation with the same product as the total cost

meriva

Answer:

$5\times 0.76= 3.8$

Step-by-step explanation:

Given: Marisa bought four bottles

Price of each bottle is $0.95.

Solving with the factors as given to find the total cost paid by Marisa.

Total cost= $4\ bottles\times \$ 0.95= \$ 3.8$

∴ Total cost paid by Marisa is $3.8.

As given to write an equation with the same product as the total cost but different factors.

∴ Lets assume the number of bottles bought by Marisa be "5" and cost of each bottle be "x"

We already find the total cost she paid is $3.8.

Now, writing an equation with different factors, as total cost remain same.

$5\times x= 3.8$

Dividing both side by 5

we get x= $ 0.76

∴ The required equation is $5\times 0.76= 3.8$

6 0

3 years ago

Use the following figure to answer the question.

Mkey [24]

Answer:

corresponding

Step-by-step explanation:

because they are in the same place on both intersections. now if u ask me doggo deserve breinliest pwease ;-;

4 0

2 years ago

Read 2 more answers

Determine if 9x^2-42x+49 can be the area of a square. If so, what would the value of X be if the square is 64 meters? A=s^2

Anton [14]

I don't know if it could be the area of a square but x has to be 8.34. (ROUNDED)

8 0

3 years ago

In preparation for an earnings report, a large retailer wants to estimate p= the proportion of annual sales

mr Goodwill [35]

Using the z-distribution, it is found that the 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.

The sample size and the estimate are given by:

$n = 161, \pi = \frac{37}{161} = 0.2298$

Hence:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 - 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.1648$

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 + 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.2948$

The 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

More can be learned about the z-distribution at brainly.com/question/25890103

5 0

2 years ago