Answer:
The first one
Step-by-step explanation:
Make 3x+6 into 3(x+2)
Separate x²+5x+6 into (x+2)(x+3)
Cross out both x+3
6x÷3
Put x+2 together to make (x+2)²

Answer:
$12.75
Step-by-step explanation:
To find the unit price of something divide the cost by the amount of the Item
Answer:
h = 22 units
Step-by-step explanation:
area = 1/2bh
165 = 1/2(15)h
15h = 330
h = 22 units