91Ó°ÊÓ

Evaluate the expression when$a  =  9  \text{and}  b  =  -  4$.

$3a+b^2+13$

Simplify the expression.

$-4\left(n+1\right)+15n$

Perform the indicated operation.

$-7.532÷\left(-2.69\right)$

Solve the equation using mental math.

$-  4  +  y =9$

Solve the equation. Check your solution.

$-13+t=10$

Simplify the expression.

$8a-2\left(7a-3\right)$

Football During the 2002 regular season of the National Football League, running back Michael Bennett played in 16 games and averaged 81 rushing yards per game. Find his total rushing yards by using the verbal model below to write and solve an equation.

Evaluate the expression using the distributive property and mental math.

$8  (3.1)$

Simplify the expression.

24. $x+17+12$

Solve the equation using mental math.

$11-p=19$