Big 20 Week 2

Write an expression for: the sum of a number and 9

• n - 9

• n * 9

• n + 9

• n/9

a third of a number, increased by 2″.

• 3n - 2

• 1/3n + 2

• 1/3n - 2

• 3n + 2

Simplify the expression: 2x + 1 + 7x 

• 10x

• 10

• 9x + 1

• 9 + 1x

Simplify the expression: 7v + 2 + 12 + 2v

• 23

• 23v

• 9 + 14v

• 9v + 14

5a + 2a + 2a 

• 9a

• 8a

• 7a

6x + 2x + 1 + 4

• 8x + 5 

• 2x - 3

• 4x - 2

• 8x + 12 

Translate this phrase into an algebraic expression.

The difference of 3 times a number and 7

Use the variable n to represent the unknown number.

• 3 - 7n

• 3n - 7

• 3n + 7

• 3 / 7n

Write a verbal expression for:

2a+6

• 6 more than the product of 2 and a number

• 6 less than the product of 2 and a number

• 6 more than the quotient of 2 and a number

• twice a number plus 6

A rectangle has width (2x + 3) and length (2x - 4).  What is the perimeter of the rectangle?

• 4x - 12

• 4x - 1

• 8x - 2

• 4x² - 2x - 12

Find the perimeter of the triangle

• $4x+64$

• $4x^2+64$

• $3x+50$

• $3x^2+50$