An equation to represent that data from questions 1-3 is n=-16.25p+230 where p represents the price and n represent the number of copies sold. PART A Using this equation about how many books to you predict were sold at $7.00 a copy?

60

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

figure c

step-by-step explanation:

hope this .

the answer is -1 1/5, also a

hope i

-lavira : )