Find the value of p and of q for which x-3 is a common factor of the expressions and WILL GIVE BRAINLIEST PLS ANSWER

Step-by-step explanation:

Use the Factor Theorem,

" if x-a is a factor of f(x), then f(a) =0,

So here, since x-3 is a factor then f(3)=0,

So first step, plug in 3 for x for the serperate equations.

Simplify both equations,

Isolate the constants,

We have a system of equations so let eliminate a variable, by subtracting the two equations.

Plug p back in for any one of the equations to find q.

So p is -6

q is 4.5

The answer is in the image 

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The answer is in the image 

The answer is in the image 

The total nom of  code that can be used is equal to 5+3 = 8

The answer is in the image 

The solution is in the following image

The answer is in the image 

Salesperson will make 6% of 1800

=(6/100)*1800

=108

Salesperson will make $108 in $1800 sales