This looks hard... good luck ! :D
Answer:
The sum of ages of all 18 pupils in the class = 81
Step-by-step explanation:
Total number of pupil in the class = 18
Average of years in the class = 
Now, 
⇒Average of sum of ages in the class = 4.05
Let us assume the sum of ages of all students in the class = m
By the formula for AVERAGE:


or, m = 18 x 4.5 = 81
Hence, the sum of ages of all 18 pupils in the class = 81
Since complements of the same angle are congruent, we know that both angles are congruent, meaning they have the same measure. To find the value of X, set the two angles equal to each other and solve
Answer:
6-n
Step-by-step explanation:
it is subtracting a number from 6
I hope this helps!
Answer:
Angle ABC = 58
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These two angles are opposite but meet at the same vertex. This means that they are equal to each other. To solve the equation below, isolate the variable and you have your answer!
3x - 14 = 2x + 10
-2x -2x
x - 14 = 10
+14 +14
x = 24
Angle ABC
3(24) - 14 = ?
72 - 14 = 58