2 years ago

Brainlist asap !!

Mathematics

1 answer:

liraira [26]2 years ago

4 0

Answer:

1)600

2)36%

3)392,000

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PLEASE, I REALLY NEED YOUR HELP!!!

Brrunno [24]

Answer:

d + q + p= ¢

Step-by-step explanation:

you add all the variables

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3 years ago

Read 2 more answers

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

Sarah earned $73.50 Babysitting. She charges $3.50 per hour. We many hours did Saran baby-sit

Mamont248 [21]

21 hours
73.50 x 3.50 = 21 hours

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3 years ago

Madison wants an equal amount of party favors for 6 or 8 people, what is the least number of party favors madison should make

Whitepunk [10]

The answer is 24 because the least common multiple of 6 and 8 is 24.

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3 years ago

Please help me this will mark brainiest thx I will appreciate it thank you

Savatey [412]

Answer:

z=40 degrees

x=90 degrees

y=40 degrees

Step-by-step explanation:

To solve z you know that 50+90+z= 180 degrees. So z equals 40. To solve x you subtract 90 from 180 to get 90 degrees. To solve you add 50+x+y. You know that x= 90. You would add the angles together to get 180 degrees. 50+90=140 and 180-140 equals 40. Sorry if i'm wrong.

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3 years ago