so hmmm on average on the last 7 test, you get 82, so hmmm we could say that on each of the 7 tests you got 82, so you got 82, 7 times.
now, let's say in the 8th test, you get a grade of "g", now, if we were to get an average of all 8 tests, that means the average will simply be (82*7) + "g", and we know that's 84, so

Answer:
14
Step-by-step explanation:
f'(2) = 2y + 10
f'(2) = 2(2) + 10
= 4 + 10
= 14
2.25/100 x =630
x= 630 x 100/2.25
x= 28000
Answer:
1.17
2.10
3.7
Step-by-step explanation:
1. 68÷4=17
2. 30÷3=10
3.70÷10=7 ( 10 used from 2.)