Tim is opening up a bookstore, where he sells both new old books. he charges 11.50 for a new book , and $4.50 for an old book. what was tim's revenue last month if he sold 15 books and 12 old books

226.50

Step-by-step explanation:

11.50*15=172.5(0)+4.50*12=54.0226.50

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

2.83941151 would be the answer you're looking for! : )