Answer:
Jenkins: 25 hours Alexanders: 20 hours
Step-by-step explanation:
To solve this problem we need to set up two equations. We know the rates of each sprinkler's output and how much total water was output. We know how many hours the sprinklers were on. We are looking for how long each sprinkler was used.
We can make a represent hours because we know the rate of sprinkler's output is per hour.
25a+40b=1425
a+b=45
Now to solve this system of equations we need to isolate a variable on one equation to plug into the other.
a+b=45
a=45-b
Now we can plug this in for a in the other equation.
25a+40b=1425
25(45-b)+40b=1425
Distribute 25 into the parenthesis.
1125-25b+40b=1425
1125+15b=1425
15b=300
b=20
Now we know that the Alexander family used their sprinklers for 20 hours. We can plug this back into the other equation to find b.
a+b=45
a+20=45
a=25
The Jenkins used the sprinklers for 25 hours, and the Alexanders used them for 20 hours.
Given:
Initial value = 25,000
depreciation = 15% per annum based on net book value
Net book value = 25,000 (1 - 0.15)^t
where t is the number of years
NBV = 25,000 (0.85)^5
NBV = 25,000 (0.4437)
NBV = 11,092.50
The approximate value of the car 5 years from date of purchase is 11,092.50
Answer:
5 pounds per bag simplified from 30 pounds per 6 bags
Step-by-step explanation:
6 bags of rice is 30 pounds. This means 30 pounds per 6 bags which simplifies to 5 pounds per 1 bag.
Answer: 10
Step-by-step explanation:
I did the math, also not to be rude but stop using so many 'enter' commands
