2 years ago

The y-coordinate of the vertex of the function y = 2x^2-8x+c is 2. The value of c is...

Mathematics

2 answers:

marta [7]2 years ago

7 0

Answer:

i am not sure but tried .

$c=y-2x^{2} +8x$

Step-by-step explanation:

Viktor [21]2 years ago

3 0

The value of c would be 16.

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Answer:

15/19 is a rational number. this is because irrational numbers cannot be represented by fractions

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3 years ago

P = 17w what do p represent

Sonbull [250]

Answer:

perimeter

Step-by-step explanation:

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3 years ago

Read 2 more answers

What is the value of X?<br> A. 5<br> B. 2.5<br> C.7.5<br> D. 10

gizmo_the_mogwai [7]

10 is the value of x

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3 years ago

At an amusement park, 8 out of 80 tickets sold were discount tickets. What percentage of the tickets were discount tickets?

bixtya [17]

10%

8 / 80 = .1 move your decimal =10%

7 0

3 years ago

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