A bakery sells cakes for $18 each and pies for $15 each. Last weekend the bakery sold 118 total items and earned $1,932. How many pies were sold last weekend?

18

=

15

=

118

=

1

=

932

=

Step-by-step explanation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c