Algebraic Expressions Pretest

Which  two expressions are equivalent?

•  $3^5$  and  $3\times3\times3\times3\times3$  

•  $3^5$  and  $3+3+3+3+3$  

•  $3^5$  and  $35$  

•  $3^5$  and  $5\times5\times5$  

Which numeric expression is equivalent to  $2^3\times5^2$  ?

•  $6\times10$  

•  $\left(2+2+2\right)\times\left(5+5\right)$  

•  $2\times2\times2\times5\times5$  

•  $5\times7$  

Simplify 5 + 8 × 2 – 7.

• 19

• 14

• 33

• Answer cannot be determined without ( ) .

Evaluate the expression 12a + 9 – b if a = 2 and b = 3 .

• 14+6

• 18

• 30

• Answer cannot be determined because there is no "+" or "-" sign between 12 and "a".

Rewrite the algebraic expression  $2\left(x+5\right)$  .

•  $2x+5$  

•  $7x$  

•  $2x+5x$  

•  $2x+10$