Answer:
Step-by-step explanation:
- Plain wrapping paper - p
- Shiny wrapping paper - s
<u>Equations:</u>
- 10p + 4s = 170
- 5p + 3s = 105
<u>Double the second equation and subtract from the first one:</u>
- 10p + 4s - 10p - 6s = 170 - 210
- -2s = - 40
- s = 20
<u>Find p:</u>
- 10p + 4*20 = 170
- 10p = 90
- p = 9
Answer:
15
Step-by-step explanation:
Answer:
$0.80
Step-by-step explanation:
Find the unit rate
1 apple costs ?
1.20/6 = cost of 1 apple
1 apple = $0.20
4 apples = $0.20 * 4
4 apples = $0.80
The method is to multiply
Answer:
a = -1.58
Step-by-step explanation:
1/3 +a+5/4 =0
1/3+5/4= -a
4+15/12 = -a
19/12 = -a
1.58= -a
1.58/-1 = -a/-1
-1.58 = a
