A school supply kit costs x dollars. A sale offers a 20% discount on the kit. Part A
Which expression shows how to find the cost, in dollars, of the kit after the discount?
O 0.8x
O 0.2x
O 1.8x
O 1.2x

0.2x

Step-by-step explanation:

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation:

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: