^{The perimeter of the
 triangle is 10x+20. Find the length of the missing side}

• 6x+10
• 15x+30
• 5x+10
• 5x-10

Tags

CCSS.3.MD.D.8

Distribute
-3x(x²-5+9x)

• -3x³+15x+27x²
• 3x³+15x-27x²
• -3x³+15x-27x²
• -3x³-15x-27x²

Tags

CCSS.HSA.APR.A.1

Simplify
(2x-7)(6x+4)-(5x-20)

• 12x²+39x+8
• 12x²-39x-8
• 2x²+41x-168
• 2x²-41x+168

Tags

CCSS.6.EE.A.3

Distribute
12x²(x – 8)

• 12x²-96
• 12x³-96x²
• 12x³-96x
• 12x²-96x²

Tags

CCSS.HSA.APR.A.1

Combine like terms
(3x² + 7y – 5xy + 8) +
(2x² – y + 4xy – 9) 

• 5x²+6y-xy+1
• 5x²+6y+xy-1
• 5x²+8y-xy-1
• 5x²+6y-xy-1

Tags

CCSS.HSA.APR.A.1

Which of the following is the monomial? 

• 5y²-15
• ax²+bx+c
• 4x+6
• 2

A hexagon has three sides of length (x+2) and three sides of length (x-9). What is the perimeter, P, of the hexagon in terms of x?

• P=6x-21
• P=x²-7x-18x
• P=6x+21
• P=2x-7

Tags

CCSS.7.EE.A.1

Distribute
x(x³+2x²-7x-9) 

• x⁴+2x³-7x²-9x
• x³+2x²-7x-9
• x⁴+2x³-7x²-9
• x⁴+2x³-7x-9

Tags

CCSS.HSA.APR.A.1

Which expression describes the sum of 8(4x-12) and 7(x+3)?

• 25x-75
• 39x-75
• 39x+75
• 25x+75

Tags

CCSS.6.EE.A.3

Combine like terms
(-4x²+5)-(-3x²-9) 

• -x²+14
• -7x²+14
• -x²-4
• -7x²-4

Tags

CCSS.7.EE.A.1