What is x if:
9+10=x
a. x=109
b. x=91
c. x=21
d. x=19

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50