Suppose the profit the company makes on each customer visit is $0.75 per dvd minus $0.05 "fixed costs." that is, if p = profit, then p x  0.75 0.05.  use a linear transformation of your results in (a) and (b) to find the mean and standard deviation for p.

the ratios are reciprocals im positive

step-by-step explanation:

they are all positive numbers so it wouldn't be the other ones

c

step-by-step explanation:

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated