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3 years ago

WILL GIVE BRAINLIEST!

Mathematics

1 answer:

Brrunno [24]3 years ago

5 0

Answer:

The graph is not a function of x because x=0 intersects the graph at two points.

Step-by-step explanation:

The vertical line test is when you draw, well, a vertical line through the graph. the slope of a vertical line is undefined, and the formula written as x=_. So we can eliminate the choices with y=_.

We can clearly see that this graph isn't a function, so we can eliminate the answer choices that say that the graph is a function.

Just in case, draw a line at x=0, to check that it does indeed cross the graph in 2 places.

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Two college roommates have each committed to donating to charity each week for the next year. The roommates’ weekly incomes are

schepotkina [342]

Answer:

C. 5 weeks.

Step-by-step explanation:

In this question we have a random variable that is equal to the sum of two normal-distributed random variables.

If we have two random variables X and Y, both normally distributed, the sum will have this properties:

$S=X+Y\\\\\ \mu_S=\mu_X+\mu_Y=30+60=90\\\\\sigma_S=\sqrt{\sigma_X^2+\sigma_Y^2}=\sqrt{10^2+20^2}=\sqrt{100+400}=\sqrt{500}=22.36$

To calculate the expected weeks that the donation exceeds $120, first we can calculate the probability of S>120:

$z=\frac{S-\mu_S}{\sigma_S} =\frac{120-90}{22.36}=\frac{30}{22.36}=1.34\\\\P(S>120)=P(z>1.34)=0.09012$

The expected weeks can be calculated as the product of the number of weeks in the year (52) and this probability:

$E=\#weeks*P(S>120)=52*0.09012=4.68$

The nearest answer is C. 5 weeks.

6 0

3 years ago

3.3.1: A roof has a pitch of 15°, as shown. If the width of the roof, WY, is 28 ft,

dimaraw [331]

Answer:

dance to this bih if u gang bang i dont give a fuh if we dont bang the same thang

Step-by-step explanation:

7 0

3 years ago

Mr martinez sells a car for $15,400. how much does he earn with a 1.5% commission

spayn [35]

It would be 15400*0.015=How much he will make

3 0

3 years ago

Read 2 more answers

Si el peso de la figura es de 80 N cuales son las tensiones en las cuerdas a y b

Sauron [17]

Answer: Can you translate for me? I don't know spanish.

Step-by-step explanation:

8 0

3 years ago

Help........................

MrRissso [65]

since the powers are same, ignore 'em , and let's calculate the bases.

-16.(1/2)

-8.1 (upon cancellation)

ans = -8

hope it helps...!!!

5 0

2 years ago