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3 years ago

(8x2 + 5x – 9) - (3x2 – 5x + 1) = ?

Mathematics

1 answer:

Svetach [21]3 years ago

7 0

Answer:

10x

Step-by-step explanation:

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Conduct the appropriate hypothesis test and compute the test statistic. A company that produces fishing line undergoes random te

andre [41]

Answer:

Option D) Yes, because the test statistic is -2.01

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 30 pound

Sample mean, $\bar{x}$ = 29.1 pounds

Sample size, n = 20

Alpha, α = 0.05

Sample standard deviation, s = 2 pounds

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30\text{ pounds}\\H_A: \mu < 30\text{ pounds}$

We use one-tailed(left) t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{29.1 - 30}{\frac{2}{\sqrt{20}} } = -2.012$

Now,

$t_{critical} \text{ at 0.05 level of significance, 19 degree of freedom } = -1.729$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis. Thus, there were enough evidence to conclude that the fishing line breaks with an average force of less than 30 pounds.

Option D) Yes, because the test statistic is -2.01

5 0

3 years ago

Bertie Bee's Carpet Cleaners charge $1.22 per square foot to clean carpets. Millie Mott's Carpet Cleaners charge $9.50 per squar

Crank

Answer:

Bertie Bee's Carpet Cleaners

6 0

3 years ago

12. Find the values of x, y, and z.<br> (1 point)

Anuta_ua [19.1K]

Answer:

b. x = 80, y = 100, z = 63

Step-by-step explanation:

3 0

2 years ago

If m = 7x + 7, m = 4y, and m = 112, find the values of x and y

tester [92]

<span>If m = 7x + 7, m = 4y, and m = 112

since m = 112

112 = 7x + 7
112 - 7 = 7x
105= 7x
x = 15

112 = 4y
y = 28</span>

6 0

3 years ago

Read 2 more answers

I need the answer and explanation to how you get the answer please, please, I’m giving 30 points...

12345 [234]

Step 1 = 3.9 × 0.5 + 4 5/6 ÷ 3 3/7
Step 2 = 3.9 × 0.5 + 29/6 ÷ 24/7
Step 3 = 4.4 + 29/6 × 24/7
Step 4 = 4.4 + 29/1 × 4/7
Step 5 = 4.4 + 111/7
Step 6 =44/10 + 111/7

Step one : Write the problem
Step two : Change the mixed numbers to improper fractions
Step three : Multiplication and Division should be done first. Then simplify.
Step four : Change the division to multiplication and multiply.
Step 6 : Add the remaining fractions

Sorry i didn't know which one so i did the first one. Hope it helps you.

8 0

3 years ago