Answer:
Step-by-step explanation:
Given
From the first statement:
From the second:
Required
Find M and S
We have:
and
Substitute in
Divide both sides by 2
Hence;
11/8 OR 1 3/8
Answer:96%
Step-by-step explanation: 4 x 90 = 360, 87 + 88 + 89 = 264, 360 - 264 = 96