Question

A pencil at a stationery store costs $1, and a pen costs $1.50. Stella spent $21 at the store. She bought a total of 18 items. Which system of equations can be used to find the number of pencils (x) and pens (y) she bought?


A. x + 18y = 21
x = 1.5y
B. 18x + y = 21
x = 1.5y
C. x + 1.5y = 21
x + y = 18
D. 1.5x + y = 21
x = 18y

Answer 1

she bought a total of 18 items (both pens and pencils)
x + y = 18

pencils (x) cost $1 and pens (y) cost $1.50.....totaling $21
1x + 1.50y = 21.....or you could leave the 1 off the x and the 0 off of 1.50 ......x + 1.5y = 21

Answer 2

so is it C?

Answer 3

@texaschic101

Answer 4

@Spring98 do you have more questions?

Answer 5

no

Answer 6

okay