siqijcueinf siqijcueinf

11-07-2017
Mathematics

contestada

The perimeter of a rectangle is 40 units. One side of the rectangle is 7 and the other is x+2. What's the value of x?

Respuesta :

koziadam koziadam

11-07-2017

Formula for perimeter of rectangle = 2l + 2w

Substitute

40 = 2(7) + 2(x+2)
40 = 14 + 2x + 4
40 = 18 + 2x
22 = 2x
/2 /2
11 = x

Therefore 11 = x

Proof:

x + 2 = ?
11 + 2 = 13

13 + 13 + 7 + 7 = 40

Answer Link

Otras preguntas

why is the statement “The sun is the basis for all life on Earth” true?

You and your family are planning a vacation to Orlando Florida! Your family has a budget of $5,500. You will be traveling by car. Orlando Florida is 1,950 mile

What is the gradient of the graph shown?

Your family uses 25 pieces of bread each week. How much loaves do you need, and how much will it cost?

Plzzzzzzz helpppppppp

Mrs. Linda has 17.16 cups of brownie mix. If each brownie uses 0.33 cups of mix, how many brownies can Mrs. Linda make?

what is the slope of a line that contains the points (-8,7) and (-4,-5)?

On average, people need about 2,000 calories a day to provide energy for their bodies. True or false?

Dana is looking for images that illustrate the contrast principle of design in an advertising layout. Which images should she pick?

12 +12 =24+13 +12+6789+12