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3 years ago

8

Write an equation of the line below.

1 answer:

Allushta [10]3 years ago

6 0

Answer: $y= \frac{4}{3}x-\frac{1}{2}$

Step-by-step explanation:

Find the slope first by using the equation $\frac{y1-y2}{x1-x2}$ then you can go from there and either use the equation form and substitute all the numbers to solve for the y-intercept or use the graph.

Hope this helps!

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Fill in table and find slope. Please answer ASAP and show work please!

dybincka [34]

Slope is 1/2 love u g

5 0

3 years ago

A pair of shoes costs $30.99 and the sales tax is 5%. Use the formula C=p+Rp to find the total cost of the shoes , Where c is Th

sergeinik [125]

C=p+R x p
C=30.99 + .05 x 30.99
Order of operations states do the multiplication first
C=30.99 + 1.55
C=32.54

7 0

4 years ago

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained p

Alekssandra [29.7K]

Using the z-distribution and the formula for the margin of error, it is found that:

a) A sample size of 54 is needed.

b) A sample size of 752 is needed.

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $\alpha$ , we have the following confidence interval of proportions.

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

In which z is the z-score that has a p-value of $\frac{1+\alpha}{2}$ .

The margin of error is of:

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

90% confidence level, hence $\alpha = 0.9$ , z is the value of Z that has a p-value of $\frac{1+0.9}{2} = 0.95$ , so $z = 1.645$ .

Item a:

The estimate is $\pi = 0.213 - 0.195 = 0.018$ .

The sample size is <u>n for which M = 0.03</u>, hence:

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

$0.03 = 1.645\sqrt{\frac{0.018(0.982)}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.018(0.982)}$

$\sqrt{n} = \frac{1.645\sqrt{0.018(0.982)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.645\sqrt{0.018(0.982)}}{0.03}\right)^2$

$n = 53.1$

Rounding up, a sample size of 54 is needed.

Item b:

No prior estimate, hence $\pi = 0.05$

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

$0.03 = 1.645\sqrt{\frac{0.5(0.5)}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.5(0.5)}$

$\sqrt{n} = \frac{1.645\sqrt{0.5(0.5)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.645\sqrt{0.5(0.5)}}{0.03}\right)^2$

$n = 751.7$

Rounding up, a sample of 752 should be taken.

A similar problem is given at brainly.com/question/25694087

5 0

3 years ago

How do i solve this

MAXImum [283]

Answer:

x = 0, x = 3

Step-by-step explanation:

Given

- 4x² = - 12x ( add 12x to both sides )

- 4x² + 12x = 0 ← factor out - 4x from each term

- 4x(x - 3) = 0

Equate each factor to zero and solve for x

- 4x = 0 ⇒ x = 0

x - 3 = 0 ⇒ x = 3

5 0

3 years ago

You are going to buy some cable television ads. You can get 20 spots for $1200 or 80 spots for $3200 what is the percentage disc

Lesechka [4]

Answer:

33 1/3%

Step-by-step explanation:

When you buy 20 ads, the per-ad rate is

$1200/20 = $60 . . . per ad

When you buy 80 ads, the per-ad rate is

$3200/80 = $40 . . . per ad

The percentage change to the $60 price is ...

((new price) - (original price))/(original price) × 100%

= ($40 -$60)/$60 × 100% = -20/60 × 100%

= -1/3 × 100% = -33 1/3%

The higher volume purchase comes with a 33 1/3% discount.

5 0

3 years ago

Read 2 more answers