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3 years ago

PLEASSSSSEEE HELP A GIRL OUT PLZZ

Mathematics

1 answer:

eduard3 years ago

6 0

Answer:

B. The two lines are neither parallel nor perpendicular.

Step-by-step explanation:

First, put both lines into the same format. In this example, we're going to use y=mx+b format.

x - 4y = -9

-4y = -x + -9

y = (-x + -9) / -4

y = (x+9)/-4

y = (-1/4)x + (-9/4)

y = 3x - 7

If two lines are parallel, they have the same slope. (ie 4 and 4)

If two lines are perpendicular, one line's slope is the negative reciprocal of the other. (ie 4 and -1/4)

Neither is true here.

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Please help me with my math homework??

qaws [65]

-2 1/2 / 6 would be -5/12, just turn - 2 1/2 into a decimal and divide by 6 :)

4 0

4 years ago

Factor -4 out of -12r + 20.

Wewaii [24]

Answer:-12r+20=-4(3r-5)

Step-by-step explanation:

Pls mark as brainliest

4 0

3 years ago

Read 2 more answers

Santa's Wonderland is an extravagant holiday light display that is open from early November through January each year. The entry

Fofino [41]

Ok,
f(0.35)= 7f/20

f(-5.2)=-26f/5

f(10)= 10f

f(-0.5)= -f/2

as for the last question I am not quite sure, sorry....hope I helped a little :)

5 0

4 years ago

Jacob knows that the adult population gets, on average, eight hours of sleep each night. A hypothesis test can help him see if c

Vlad [161]

Answer:

The t-statistic that Jacob calculates is $t = -2.71$

Step-by-step explanation:

Jacob knows that the adult population gets, on average, eight hours of sleep each night. A hypothesis test can help him see if college students are different from the adult population.

At the null hypothesis, we test if the mean is of 8 hours, that is:

$H_0: \mu = 8$

At the alternative hypothesis, we test if the mean is different of 8 hours, that is:

$H_1: \mu \neq 8$

The test statistic is:

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

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.

8 is tested at the null hypothesis:

This means that $\mu = 8$

From a sample of 101 students, Jacob tabulated that his sample of students got an average of 7.3 hours of sleep each night, with a standard deviation of 2.6.

This means that $n = 101, X = 7.3, s = 2.6$