Question

Joanna went school supply shopping. She spent $35.72 on notebooks and pencils. Notebooks cost $2.24 each and pencils cost $1.48 each. She bought a total of 19 notebooks and pencils. How many of each did she buy?

Answer 1

hey there every question you answer ill give you a medal deal?

Answer 2

fan too?

Answer 3

im already yoour fan

Answer 4

oh haha 1 sec

Answer 5

ok

Answer 6

We need to make 2 equations to represent this. Do you know how to do that?

Answer 7

Pretty sure its 11 and 8

Answer 8

11 notebooks

Answer 9

medal and @ for more

Answer 10

n + p = 19 ----> n = 19 - p
2.24n + 1.48p = 35.72

now sub 19 - p in for n in the 2nd equation
2.24(19 - p) + 1.48p = 35.72
42.56 - 2.24p + 1.48p = 35.72
-2.24p + 1.48p = 35.72 - 42.56
- 0.76p = - 6.84
p = -6.84/-0.76
p = 9

n + p = 19
n + 9 = 19
n = 19 - 9
n = 10

check..
2.24n + 1.48p = 35.72
2.24(10) + 1.48(9) = 35.72
22.40 + 13.32 = 35.72
35.72 = 35.72 (correct)

notebooks (n) bought were 10 and pencils (p) bought were 9