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.
Answer:
d
Step-by-step explanation:
Answer:
4 1/2 hours
Step-by-step explanation:
Total time worked was ...
2 3/4 + 1 3/4 = (2 +1) + (3/4 +3/4)
= 3 + (1 1/2) = 4 1/2 . . . hours
Realistic occupations which is letter b
Given :
- The length of the sides of the triangle are in the ratio 5:8:10 .
- The Perimeter of the Triangle is 115 cm.
To Find :
- The length of the sides of the triangle.
Solution :
Let us assume the sides be 5x cm, 8x cm and 10x cm.
We know,

So, Substituting the values :




Therefore,
The length of the sides of the triangle are :


