Solve the system of liner equation by substitiotom 6x-9=y and y=-3x

(1,-3)

x=1 y=-3

Step-by-step explanation:

6x-9 = y

substitute y = -3x into the above equation

6x-9 = -3x

subtract 6x from each side

6x-9-6x = -3x-6x

-9 = -9x

divide by -9

-9/-9 = -9x/-9

1 =x

now we need to solve for y

y = -3(1)

y = -3

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p