Part a
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If 20 feet cost $36 then you can divide 36 by 20 to see how much one foot would cost. The answer is $1.80. Then multiply $1.80 x 15 feet and you get $27
Answer:
3, -1/2
Step-by-step explanation:
(4x – 5)^2 = 49
Take the square root of each side
sqrt((4x – 5)^2) = ±sqrt(49)
4x-5 = ±7
Add 5 to each side
4x -5 + 5 = 5 ±7
4x = 5±7
Divide each side by 4
4x/4 = (5±7)/4
x = (5±7)/4
First take the positive
x =( 5+7) /4 = 12/4 = 3
Then the negative
x = (5-7) /4 = -2/4 = -1/2
