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anonymous
 4 years ago
The length of a rectangle is 7 inches more than the width. The perimeter is 42 inches. Find the length and width
anonymous
 4 years ago
The length of a rectangle is 7 inches more than the width. The perimeter is 42 inches. Find the length and width

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1348706471681:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Cool, so for that rectangle, perimeter is 42. How do you find the perimeter?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Do you know the formula for finding the perimeter of an object?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yeah, in this case for the rectangle, P = 2*length + 2*width. So you have values for the length and the width, right? L = x + 7 W = x

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Plug those values into the perimeter function, what does the equation look like after doing that?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0my equation looks like this 42=2(7)+2w 4214=28 which makes w = 14 then for L 14+7=21 am i right

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Getting there, so the values you have for each dimension are actually variables  (x+7), and x Therefore P = 2*L + 2*W becomes L = x + 7 W = x P = 2*(x+7) + 2*(x) 42 = 2*(x+7) + 2*(x)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Because there is only one variable, one unknown, that being 'x', we can easily then solve for it from the adjusted equation.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Does that make sense? Give that equation a shot, and solve for x.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Definitely! that's it, so L = ? and W = ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Just have to do that last step and you're donw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Quite easy after finding x...
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