Simplify: -10(2r - 4)

Simplified -20r + 40

Step-by-step explanation:

Step 1: Use the distributive property. -10(2r - 4)    

-10 x 2r = -20r and -10 x (-4) = 40

(If you are multiplying two negative integers your answer will always be positive.)

Step 2: Simplified (-20r + 40)

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8