Variables and Expressions

The sum of five and a

• 5-a

• 5+a

• 5a

f less than 15

• 15-f

• 15+f

• f-15

a number m increased by 30

• 30m

• m-30

• m+30

The product of 10 and g

• 10g

• 10+g

• g-10

• $10\div g$
  

The quotient of 17 and x

• 17-x

• x+17

• 17x

• $17\div x$

Evaluate:

12a, when a=3

• 15

• 4

• 36

• 20

 $19-\left(a-4\right),\ when\ a=8$  

Evaluate:

• 15

• 7

• 11

• 13

Evaluate:

abc, when a=5, b=4, c=3

• 12

• 60

• 78

• 543

Evaluate: 

3(b+c), when b=10, c=5

• 45

• 150

• 40

• 13

 $Evaluate:\ 45\div b$ ,when b=9

• 5

• 9

• 6

• 4