2 years ago

(-q^2 + 3q + 4) - (7q^2 + 7q)

Mathematics

1 answer:

vfiekz [6]2 years ago

4 0

Answer:−

−

Step-by-step explanation:

You might be interested in

Six more than nine times a number is -7

emmainna [20.7K]

It should be no solution

4 0

3 years ago

Help with this slope

gladu [14]

Answer:

20,100 I think

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A freight train is half a mile long. It approaches a tunnel traveling 60mi/hr. If the tunnel is 1 mile long, how long will it ta

MrRa [10]

Answer:60

Step-by-step explanation:I seen the answer on bill bye the math guy

6 0

3 years ago

Read 2 more answers

A table showing pairs of r- and yvalues is shown below.

Crazy boy [7]

Answer:

Step-by-step explanation:

6 0

3 years ago

An automobile manufacturer claims that its van has a 40.3 miles/gallon (MPG) rating. An independent testing firm has been contra

vovikov84 [41]

Answer:

The value of the test statistic is -2.64.

Step-by-step explanation:

The test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the expected(claimed) mean, $\sigma$ is the standard deviation and n is the size of the sample.

An automobile manufacturer claims that its van has a 40.3 miles/gallon (MPG) rating.

This means that $\mu = 40.3$

After testing 250 vans, they found a mean MPG of 39.9. Assume the standard deviation is known to be 2.4.

This means, respectively, that:

$n = 250, X = 39.9, \sigma = 2.4$

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{39.9 - 40.3}{\frac{2.4}{\sqrt{250}}}$

$t = -2.64$

The value of the test statistic is -2.64.

7 0

2 years ago