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2 years ago

I will Make you brainiest!!!!!

Mathematics

1 answer:

love history [14]2 years ago

8 0

Answer:

i will do it :)

Step-by-step explanation:

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(+6) + (-11) + (+5)+(-7)

tensa zangetsu [6.8K]

Answer:

(+6) + (-11) + (+5)+(-7)

(6) + (-11) + (5) - (7)

6 - 11 + 5 - 7

(6 + 5) + (-11 - 7)

11 - 18

= -7

3 0

3 years ago

Read 2 more answers

Write an equation in point-slope form for the line that has a slope of 56 and contains the point (−8,−4).

melisa1 [442]

The point-slope form:

$y-y_1=m(x-x_1)$

We have m = 56 and the point (-8, -4). Substitute:

$y-(-4)=56(x-(-8))\\\\\boxed{y+4=56(x+8)}$

3 0

3 years ago

The small piston of a hydraulic lift has an area of .01 meters squared. If a force of 250N is applied to the small piston, find

AfilCa [17]

Answer:

yes it does and it would be 1250

Step-by-step explanation:

5 0

3 years ago

Let f(x) = 4x + 5 and g(x) = 9x − 4<br> f-g<br> (f-g)(x)=

zepelin [54]

Step-by-step explanation:

f(x) = 4x + 5, g(x) = 9x − 4

(f-g)(x) = f(x) -g(x)

=4x+5-9x+4

=-5x+9

=9-5x

8 0

3 years ago

In 2009 a survey of Internet usage found that 79 percent of adults age 18 years and older in the United States use the Internet.

Alex777 [14]

Answer:

$0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}$

Option d.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

79 percent of adults age 18 years and older in the United States use the Internet.

This means that $\pi = 0.79$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a pvalue of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.33$ .

Which of the following should be used to find the sample size (n) needed?

We have to find n for which $M = 0.025$

So the equation is:

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

$0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}$

Option d.

4 0

3 years ago