If the total cost is $87, and it is split among 4 children, each will pay $21.75, because 87/4= 21.75.
This is the way we are going to solve it.
1h = 60m ----------Steps
1. 7/8w=(1+1/6)h
2. 7/8w=(6/6+1/6)h
3. 7/8w=7/6*60m
4. 7/8w=(7*6*10*m)/6
5. 7/8w=70m
6. m=(7/8w)/70
<span>7. m=1/80w
</span>
Answer: Melinda paints 1/80 of the wall in 1 minute.
Happy studying ^-^
If you have a calculator with log and expo function capabilities, type in:
log 16.7 ENTER
and the calculator will return 1.2227. Try it.
y = abˣ
20 = ab¹
20 = ab
b b
20/b = a
y = abˣ
4 = (20/b)b²
4 = 20b
20 20
¹/₅ = b
y = abˣ
20 = ¹/₅b¹
20 = ¹/₅b
¹/₅ ¹/₅
100 = b
y = abˣ
y = 100(0.2)ˣ
