Wallace has a $50 bill. Pizza pies cost $12.25 each. If p represents the number
of pizzas he buys, write an expression for
the change he receives.

50-12.25p

This expression will give you the change he will receive after purchasing p amount of pizzas.

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

351.23

step-by-step explanation: