Jakob is asked to simplify the expression –3a + 4b + 5a + (–7b).
1 answer:
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Answer:
$102.635
Step-by-step explanation:
To get the solution, we are looking for, we need to point out what we know.
1. We assume, that the number 78.95 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 78.95 is 100%, we can write it down as 78.95=100%.
4. We know, that x is 130% of the output value, so we can write it down as x=130%.
5. Now we have two simple equations:
1) 78.95=100%
2) x=130%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
78.95/x=100%/130%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for what is 130% of 78.95
