Simplify Expressions Area and Perimeter

Find the perimeter of the rectangle with length ( x - 5) and width ( 3x + 1)

• 3x² -14x -5

• 3x² -5

• 8x -8

• x² -15x -5

The perimeter of a rectangle with Length=6x+5 and Width=3x

• P=9x+5

• P=9x+10

• P=18x+10

• P=18x+5

What is the perimeter of a triangle with sides the following lengths: 2a + 4c, 3c + 7, and 6a - 4? Combine like terms in the expressions.

• 8a + 11c

• 6a + 7c + 3

• 8a + 7c + 3

• 8a + 7c + 11

Which expression is used to find the total area of the figure shown? 

• 9 (10 + 7) 

• 9 x 10 + 7 

• (10 x 7) x 9

• 9 x 10 x 7 

• A

• B

• C

• D

Answer explanation

https://www.loom.com/share/ae5d9d616e0544248577d1176e90b1f2

Write the simplified variable expression for the PERIMETER of the given rectangle.

• 6x

• 12x

• 3x + 3

• 6x + 6

Answer explanation

Perimeter = total distance around a polygon

P = 2x + 3 + x + 2x + 3 + x

Combine the like terms:

P= 2x + x + 2x + x + 3 + 3

P= 6x + 6

What expression represents the perimeter of the triangle in simplest form?

• 3x + 2

• x + 10

• 13x

• 3x + 10

What is the Perimeter?

• 3x - 3 inches

• 6x - 6 inches

• 3x - 6 inches

• 6x - 3 inches

Ms. Calise wants to decorate her daughter's triangular bedroom by putting a banner around the perimeter of her walls. How many feet of the banner does she need?

• 31m feet

• 26m + 5 feet

• 13m + 5 feet

• 18m feet

• Michelle did not make a mistake.