**Problem : **
Identify the variable(s) in the following expressions:

a)
5*k* + 1

b)
7*b*
^{2} - (6×5)

c)
19 - *y*

d)
2×(*h* + *w*)

b)

c)

d)

**Problem : **
If
*m*
represents the number of miles Katy ran, write an expression
for:

a) The distance Katy ran plus 3 miles

b) Half of the distance Katy ran

b)

**Problem : **
If
*b*
represents the number of hours Becky spent painting, write an
expression
for:

a) Twice the time Becky spent painting

b) Twice the time Becky spent painting, plus 8 more hours

b) 2

**Problem : **
If
*s*
represents the number of shots Jeff made on the basketball court,
write an
expression for:

a) The number of shots Jeff would have made if he had made 4 fewer shots

b) The number of shots Jeff would have made if he had made 3 times as many
shots

b) 3

**Problem : **
If
*k*
represents the amount of money (in dollars) Kara spent at a thrift
shop, write
an expression for:

a) The amount of money she would have spent if she had spent 3 more dollars

b) The amount of money she would have spent if she had spent 8 times as much,
plus 6
more dollars

b) 8