Which products result in a perfect square trinomial? check all that apply.

a=(–x + 9)(–x – 9)
b=(xy + x)(xy + x)
c=(2x – 3)(–3 + 2x)
d=(16 – x2)(x2 – 16)
e=(4y2 + 25)(25 + 4y2)

Divide: 1573 ÷ 7 = a) 222 r5 b) 223 r6 c) 224 r5 d) 224 r3

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

Write an inequality and solve each problem. for exercises 11 and 12, interpret the solution.