Expressions II

What is a variable?

• any number that represents a value

• any letter that represents a value

• + - x /

• operation sign

a number squared

• $b^2$

• $3^2$

• $2^x$

• $5\times5$

three times a number

• 3n

• 3 x n

• $3^2$

• 3+3+3

a number less than 5

• 5-n

• n-5

• 5+n

• n x 5

the difference between a number and 8

• x-8

• 8-x

• 8²

• 8+x

a number increased by 12

• c+12

• 12-c

• d+12

• v x 12

Which of the following can be used as variables?

• q

• w

• r

• t

the quotient of a number and 6

• $x\div6$

• $6\div x$

• $6\times d$

• $d\times6$

If c= 5, then c+5= what?

• 10

• 5

• c

• 5+5

What is the coefficient in 6w+15-1/2?

• 6w

• 6

• 1/2

• 15