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2 years ago

Use the box method to distribute and simplify (5x – 6)(x^2 – x– 3). Drag and

Mathematics

1 answer:

mina [271]2 years ago

7 0

Answer:

The result will be: 5x³ -11x² -9x + 18

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A tire manufacturer is interested in testing the fuel economy for two different tread patterns. Tires of each tread type are dri

Minchanka [31]

Using the t-distribution, it is found that the 99% confidence interval for the difference is (0.058, 3.462).

We are given the standard deviation for the samples, hence, the t-distribution is used to solve this question.

The standard errors are given by:

$s_A = \frac{1.79}{\sqrt{18}} = 0.4219$

$s_B = \frac{1.95}{\sqrt{18}} = 0.4596$

For the distribution of differences, the mean and the standard error are given by:

$\overline{x} = \mu_A - \mu_B = 23.95 - 22.19 = 1.76$

$s = \sqrt{0.4219^2 + 0.4596^2} = 0.6239$

The interval is given by:

$\overline{x} \pm ts$

The critical value for a two-tailed 99% confidence interval with 18 + 18 - 2 = 34 df is t = 2.7284.

Then:

$\overline{x} - ts = 1.76 - 2.7284(0.6239) = 0.058$

$\overline{x} + ts = 1.76 + 2.7284(0.6239) = 3.462$

The 99% confidence interval for the difference is (0.058, 3.462).

For more on the t-distribution, you can check brainly.com/question/16162795

3 0

3 years ago

If a family of four pays $56.25 at a restaurant, how much would a family of six pay

grin007 [14]

Answer:

$84.38

Step-by-step explanation:

Assuming each member costs the same price, multiply by the fraction (6/4).

In other words, divide the total by 4 to get 1 person. Multipluy by 6 to see how much 6 people would cost.

56.25 x 6 = 337.5

337.5/4 = 84.375

6 0

4 years ago

Read 2 more answers

The sum of two integers is 10. Their difference is 4. What are the two integers?

dalvyx [7]

answer = 7&3

step by step solution

let's take X and Y two intigers

X+Y=10

X-Y=4

adding both equation

X=7

Y=3

5 0

3 years ago

X 1 у 3 4 6. 516 What is R

Dmitrij [34]

Answer:

the question is not correct. please rewrite the question.

7 0

3 years ago

Find the sale price Original price: $50 Discount: 15% Sale price: $

Tema [17]

I hope that i helped ;D

8 0

2 years ago