**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*)

a)

*k*
b)

*b*
c)

*y*
d)

*h*,

*w*
**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

a)

*m* + 3
b)

*m*/2
**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

a)

2*b*
b)

2*b* + 8
**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

a)

*s* - 4
b)

3*s*
**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

a)

*k* + 3
b)

8*k* + 6