Expressions & Equations

Which of the following expressions represent multiplication?

• $6\left(3\right)$

• $5x$

• $\frac{1}{2}\cdot\frac{3}{4}$

• $7\left(x+9\right)$

 Solve the problem below:
 $8\left(6\right)=$ 

 Solve the problem below:
 $14\left(\frac{1}{2}\right)=$ 

Combine the terms below:
 $9x+3x=$  

Why CAN'T we combine these terms?
 $6x+2y$  

• You can!

• They don't have the same variable.

• They are unlike terms.

• Wait, we really can't?

Which of the following expressions are equivalent to the expression below?
 $4\left(a-2\right)$  

•  $4a-8$  

•  $4a-4$  

•  $4a+8$  

•  $\left(a-2\right)+\left(a-2\right)+\left(a-2\right)+\left(a-2\right)$  

Suppose $x=3$ 

Evaluate the expression:  $5x+10$  

• 15

• 20

• 25

• 30

Three friends went to the movies.

Each purchased popcorn for p dollars and

a soft drink for s dollars.

Which expressions represent the total amount of money (in dollars) that the three friends spent at the concession stand?

• $3\left(p+s\right)$

• $\left(p+s\right)+\left(p+s\right)+\left(p+s\right)$

• $3p+3s$

• $3\left(s+p\right)$

Solve for $s:$  

 $4\left(s+8\right)=48$  

Solve for $h:$  

 $10+12h=58$