Jessica started a holiday saving account with a $50 deposit. she added $25 per week for 7 weeks. what was her account balances at the end of the 7 weeks?

First: figure out how much she added during all 7 weeks

7*25=175

Then add the amount she started with

175+50=225

She had $225 at the end of the 7 weeks

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