Your neighbors purchased your favorite ice cream. They bought a half gallon for $5.50 and used a 25% coupon. What was the sale price?

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2