91Ó°ÊÓ

Write a variable expression to represent the phrase. (p. 5)

The quotient of a number and 4

Evaluate the expression when $x  =  5  \text{and}  y  =  -  2$.

Use the distributive property to evaluate the expression.

$2  (  x  -  6)$

Evaluate the expression using the distributive property and mental math.$5  (  2.9)$

Explain how you can use estimation to check that the answer of the expression $3.1·\left(-6.8\right)$is reasonable.

Solve the equation. Check your solution.

$16=a+25$

Appetizers You are having a party and are serving quesadillas as appetizers. There will be 12 people at the party. Each quesadilla will be cut into 4 wedges, and you expect each person to eat 3 wedges. How many quesadillas do you need to make?

1 Let x represent the number of quesadillas you need. Write an expression for the number of wedges in x quesadillas.

2 How many quesadilla wedges do you need to feed 12 people?

3 Use your answers from Steps 1 and 2 to write an equation that you can use to find the number of quesadillas needed.

4 Solve your equation to find how many quesadillas you need.

Solve the equation. Check your solution.

$x-2.2=3.2$

Solve the equation. Check your solution.

$-70=b-30$

Use the distributive property to evaluate the expression.

$\text{ â¶Ä‰}5\left(98\right)$