Answer:
The number is -4
Step-by-step explanation:
This is a simple equation. To set this up, you will have to multiply the number (n) by -3 and then add 8 to it before setting it all equal to 20.
-3n+8=20
-3n=12
n=-4
Answer:
A 1/5
Step-by-step explanation:
Answer:
75
Step-by-step explanation:
Average needed to get grade C = 70
Average = Total Amount / No of Items.
No of items = 4
therefore Total needed = 70 x 4 = 280
current total score = 66.75 + 66 + 72.25 = 205
the fourth test minimum score = 280 - 205 = 75