There are 15 students volunteering for a project. Some of them are freshmen and some are sophomores. Sophomores have volunteered 2 hours each and freshmen have volunteered 3 hours each with a total of 40 hours volunteered. Try to write a system of equation store present this situation and then solve the system.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

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step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

the answer is 8/21

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