Anumber is decreased by seven. then, the new number is multiplied by 3 to get an answer of -9. what is the original number?
a) -30
b) 30
c) 4
d) -4

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof

when the daily mileage is greater than 40 miles, unlimited mileage plan will save you money. 40 miles is the break-even point.

step-by-step explanation: