Answer:
yes
Step-by-step explanation:
note that 20% =
= 
Hence to find 20% of a number, dividing the number by 5 is correct
20% of £30 =
= £6
we have

If c is the independent variable
then
p is the dependent variable
so
clear variable p

Divide by
both sides

Adds
both sides


Write the equation in function notation

therefore
the answer is
the equation in function notation is equal to 
U don't have enough information to answer the question because u need to know how much the gas is per gallon
The sales tax is .075 so she would pay 23.65 for the earbuds