The ONLY multiple of 11 that's between 70 and 80 is 77 .
The answer would be (x+2) (x+1)
$1.40 - price from a supplier = 100%
100% + 80% = 180% = 1,8 - the retail price
1,40 * 1,8 = $2,52 - the retail price
100% - 25% = 75% = 0,75 - on sale for 25% off
2,52 * 0,75 = $1,89 - the sale price.
B, -3(-4)^2+(2)4(-4) plug into a calculator