F(x)=|9-4x| find f(7)

-19

Step-by-step explanation:

put 7 in for x, 9-4(7) 4x7=28 then minus 9=19 but the lower number (9) is before the larger number (28) so the answer is negative.

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce