Answer
y=3x-2/x-1
Step-by-step explanation:
10 students averaged 80, so the sum of their scores was (10 x 80) = 800
20 students averaged 89, so the sum of their scores was (20 x 89) = 1,780
All together, the sum of all 30 scores was (800 + 1,780) = 2,580
30 students totaled 2,580, so their average was (2,580 / 30) = <em> 86</em> .
Answer:
His answer was wrong the answer should be 8.5 .
Step-by-step explanation:
3.8+4.7=8.5
It would be 21 as a percent and 0.21 as a decimal
9.10
+2.53
————
11.63
Just add the rows from the top to the bottom
