-3(x+5) - (2x+3) equals
1 answer:
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Answer:
Decimal form: 0.65
Step-by-step explanation:
To add, you need to get the denominators to be the same, so find the lowest number that both 4 and 5 fit into (multiplication):
4, 8, 12, 16, 20
5, 10, 15, 20
20 is the lowest common multiple of both. So multiply by 5 (both top and bottom) and
by 4 (top and bottom) so that the denominators will have the same value:
Simplify
Now you can add the numerators. Keep the denominators the same:
This is the most simplified version.
Given:
Over 12 hours the water in Julie's pool drained a total of 534.72 liters.
It drained the same number of liters each hour.
To find:
The change in the number of liters of water in Julie's pool each hour and what is the unit rate.
Solution:
We have,
Water drained in 12 hours = 534.72 liters
Water drained in 1 hour = liters
= liters
44.56 liters water drained in 1 hour.
So, the change in the number of liters of water in Julie's pool each hour is 44.56 liters.
The water is decreasing with respect to time, so the rate of change must be negative.
Rate of change = -44.56 liter per hour
Therefore, the rate of change is -44.56 liter per hour.