# math

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

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).

1. 👍 0
2. 👎 0
3. 👁 102

## Similar Questions

1. ### maths steve reiny bob reiny!!! Help

If line 2x+y=-3 and x-2y=1 form the sides of a rectangle whose other sides meet at the point (3, 4), find the equations of the other sides and the area of the rectangle plz help show solution step

asked by nuru on April 12, 2017
2. ### math

A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.

asked by mara on September 23, 2007
3. ### math

A rectangle has sides of 4x – 4 and 8x + 10. Find the expression that represents its perimeter

asked by Kara on January 30, 2008
4. ### Physics

A five-sided object, whose dimensions are shown in the figure, is placed in a uniform magnetic field. The magnetic field has a magnitude of 0.72 T and points along the positive y direction. Determine the magnetic flux through each

asked by Sarah on October 19, 2013

How do you write the expression for the area of the rectangle If the length of a rectangle is two more than three times it's width,then write an expression for area of the rectangle Find the perimeter of the rectangle in problem

asked by Corey wicks on February 17, 2011
6. ### Geometry

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side than from the larger side of the rectangle. The perimeter of the rectangle is equal to 56 cm. Find the lengths of the sides of

asked by Anonymous on April 10, 2017
7. ### math

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side than from the larger side of the rectangle. The perimeter of the rectangle is equal to 56 cm. Find the lengths of the sides of

asked by Anonymous on April 9, 2017
8. ### CALCULUS

The region R is a rectangle with vertices P(a,lna), Q(a,0), S(3,0), and T(3,lna), where 1

asked by Anonymous on May 5, 2012
9. ### Alg II

I have a rectangle whose sides are in the proportion b:a, where b is the longer side. I draw a line parallel to a inside the rectangle in order to break it up into a square with sides of length a and a second rectangle. Amazingly,

asked by Peter on January 11, 2011
10. ### math

One side of the rectangle lies along the line 4x+7y+5=0 , two of its vertices are (-3,1)and (1,1). find (i) the equations of the other three sides. (ii) the angle between the two diagonals of the rectangle . (iii) the area of the

asked by Nora on December 27, 2011

More Similar Questions