Equation and Expression Review

Which of the following is an equivalent expression to -7x + 4 ?

• 3x + 2 - 5(2x + 1)

• 3x + 2 - 2(5x + 2)

• 3x + 6 - 2(5x + 1)

• 3x + 3 - 5(2x + 2)

Which of the following is an equivalent expression to -3(-6x - 7) ?

• 18x - 21

• -18x - 21

• -18x + 21

• 18x + 21

Which expression is equivalent to 6x - 15 ?

• 3(2x - 5)

• 6(x - 15)

• 3x(x -5)

• x(6 - 15)

Choose the algebraic expression that matches the verbal phrase.

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Choose the algebraic expression that matches the verbal phrase.

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evaluate bc + 5a  
when  a = 3, b = 4, and c = -6

• 9

• 38

• -38

• -9

Which is the first step in solving x - 9 = 9 ?

• Add 9 to the left side

• Add 9 to both sides

• Subtract 9 from the left side.

• Subtract 9 from both sides.

Which equation has x = -5 as the solution ?

• 2x - 1 = -11

• 2x + 1 = 11

• 4x - 2 = 14

• 4x + 2 = -8