On a buying trip in Los Angeles, Rosaria Perez ordered 120 pieces of jewelry: a number of bracelets at $10 each and a number of necklaces at $13 each. She wrote a check for $1350 to pay for the order. How many bracelets and how many necklaces did Rosaria purchase?

120×10$=1200$ ;1350$-1200$=150$

13$-10$=3$; 150$÷3$=50 13$ neklaces

120-50=70 10$ bracelets

your answer is 23/2 - 13.5

step-by-step explanation:

7/2 evaluates to

multiply x and 4.5

multiply x and 1

the x just gets copied along.

the answer is x

x

4.5*x evaluates to 4.5x

multiply 3 and 4.5x

multiply 1 and x

the x just gets copied along.

x

4.5*x*3 evaluates to 13.5x

7/2-4.5*x*3 evaluates to

  + 8 =

the answer is

7/2-4.5*x*3+8 evaluates to