We conclude that the starting average grade is 79.17%
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How to write the equation and solve it?</h3>
There are 50 students, let's say that the grades are measured between 1% and 100%.
And the average grade of the 50 students is A.
We know that after it increased by 20%, the average of the grades is 95.
Then we just need to solve the percentage equation:
95 = A*(1 + 20%/100%) = A*(1.2)
95/1.2 = A = 79.17
We conclude that the starting average grade is 79.17%
If you want to learn more about percentages:
brainly.com/question/843074
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You want to isolate the variable on one side of the equation so that you can see what it's value is with respect to the other terms
total bags of chips = (12+9+9) =30
corn : total
9:30
divide by 3 on each side
3:10
The x represents the amount of Level 1 tickets sold, the y represents the amount of level 2 tickets sold.
Answer: I don’t exactly understand what’s going on but I can’t do that
Step-by-step explanation: