HELP HELP I NEED A MATHMATICIAN TO HELP ME WITH THIS

1. Use the distributive property to expand the expression.

5(4r2 + 8s2) − (−3s + 5t)

A) 20r2 + 40s2 + 3s − 5t
B) 20r2 + 40s2 − 3s − 5t
C) 20r2 + 40s2 − 3s + 5t
D) 20r2 + 40s2 + 3s + 5t

2.
Solve the equation for x.

3(11x + 5) = 279

A) 3
B) 5
C) 8
D) 16

3. On Saturday, Bob's bakery sold 80 cupcakes for $5 each. His profit margin on the cupcakes was 50%.

Which calculation yields the amount of profit he made on the cupcakes?
A) 50 × 5, then 250 ÷ 2
B) 80 × 5, then 400 ÷ 2
C) 80 × 5, then 400 ÷ 50
D) 80 × 50, then 4,000 ÷ 5

4.
Mr. Hauseman has 17 students in his class, three of which are freshman and the others are sophomores and juniors. He is going to randomly draw two students to be partners. He calculates the probability of drawing a freshman and then a sophomore to be 3/4. How many sophomores are in the class?

A) 6
B) 7
C) 8
D) 9

giving out 15 poinzz help