Posted by Liz on Thursday, October 20, 2011 at 8:59am.
area = length x width
so ...
5(3x+2) = 75
expand, then solve for x,
That's what I was thinking as well but the 75 being squared is throwing me off. Do I need to write it as
5(3x+2)=75²?
no, just keep it as 75
they are square units, and the left side of the equation is also in square units
15x + 10 = 75
15x = 65
x = 65/15 = 13/3
then your length is 3(13/3) + 2 = 15
check:
5x15 = 75
Thank you!! That's what I thougth but I was thrown off by the square root.
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