Friday
September 19, 2014

Homework Help: math

Posted by susie on Friday, June 29, 2007 at 9:08pm.

A rectangle has sides of 3x 4 and 7x + 10. Find the expression that represents its perimeter.
3x-4+7x+10=
3x+7x=10x
−4+10= 14
10x+14
that is my answer please help

You just added two sides, a rectangle has four sides. So the perimeter should be twice what you calculated. However, you have several errors.

-4+10=-6

So you should have gotten 10x-6, however, that needs to be doubled (you only added two sides).

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - Find the equation of the tangent line 5x^2+y^2=14 at (1,3). P.S: It's ...
calculus - f(x,y)=x^2+2y^2 use the gradient vector f(5, 1) to find the tangent...
math - A rectangle has sides of 4x 4 and 8x + 10. Find the expression that ...
math - A rectangle has sides of 3x 4 and 7x + 10. Find the expression that ...
math, drbob222 - For this problem is it only asking for the exprssion(formula). ...
math 012 double check me please - 9x+3(x-4)=10(x-5)+7 9x+3x-12=10x-50+7 12x-12=...
how about his one - -7+ 5x = 10x-2? im not sure I know its -1, but im not sure ...
math - f(x) = x^2 + 10x + 24 =(x^2 + 10x)+ 24 =(x^2 + 10x + 25 - 25) + 24 f(x...
Intermediate Algebra - Determine whether the point (1, 8) is a solution of the ...
Math - The variable W represents the width of a rectangle. The length of the ...

Search
Members