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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Answer:
From the given, we establish this relationship:
RS + ST = RT
RS = ST since S is the midpoint of RT
Thus, let's use RS = ST to find x,
By substituting the given expressions:
RS = ST
8x + 11 = 14x - 1
12 = 6x
x = 12/6
thus,
x = 2
I think its -1 i not very smart so it probably wrong
The answer for your question is 686
Answer
about 4 hours and 20 minutes
Step-by-step explanation:
200 divided by 60 is 3.33 or 3 hours and 20 minutes, plus the extra hour