Unit 2 Test Corrections

Simplify the following expression:

7y²-5y+9y-7-5y²+3

• 2y²+4y-4

• -2y²-4y+4

• 12y²+14y+10

• 2y²+14y+10

Which expression is equivalent to 35m²-63?

• 7m(5m-9)

• 7(5m²-9)

• -7(5m²+9)

• -7m(5m+9)

x+7x(-3x-1)

• 21x²-6x

• -21x²-6x

• -21x²-7x-x

• 21x²+8x

Solve the following equation:

-4(4-3x)=-88

(a)  

-3(4p+2) = -2(p-2)

Solve for p. What is the value of p?

(a)  

Solve the following inequality:

-6r + 6 < 72

• r > 13

• r < 13

• r > -11

• r < -11

Solve the following inequality:

39 + n > -4(7n-4) - 6

• n > -1

• n < -1

• n > 12

• n < -12

Suppose y varies directly with x and y=25 when x = 140.

What is the value of x when y=36?

• 6.43

• 97.22

• 200

• 201.6

The total distance in centimeters a toy robot moves varies directly with the time in seconds. The toy robot moves a total distance of 264 centimeters in 11 seconds. What is the time in seconds the toy robot moves when the distance is 408 centimeters?

(a)  

Given ax-b=c, solve for x.

• x = c + b + a

• x = (c+b)/a

• x = a/(c+b)

• x = (c-b)/a