False, 24 x 10 x 90 = 21,600, 90 x 2,400 = 216,000
The correct answer would be, 300,060,520
Answer:

Step-by-step explanation:


15x+10x=12x+90; ⇔ 13x=90;

The mean of n numbers is the sum of the numbers divided by n.
You have a mean score of 84 after taking 5 tests. Let x be the sum of scores.

You scored a total of 420 points on five tests.
You need to have a mean score of 85 after taking 6 tests. Let y be the score you need to obtain. Your total score on 6 tests is 420+y.

You need to score 90 points on the sixth test.