Answer:
The third option
Step-by-step explanation:
the most reasonable
135 = 3 times 45
135 = 5 times 27
135 = 9 times 15
135 = 3 times 3 times 3 times 5 or 
times 5
Total marks for five tests = 85 * 5 = 425
Total marks in six tests with 90% would be: 90 * 6 = 540
So, the remaining marks will be: 540-425 = 115
Student must earn 115 grade in order to reach other average score of 90%
Hope this helps!
Answer:
60
Step-by-step explanation:
135 = (2x+15)
120 = 2x
x = 60
C(t) = 5t - 200
T = 5t - 200
5t = T + 200
t = (T + 200)/5
T(c) = (T + 200) / 5
