Answer:
x + y = 29
5x + 2y = 100
Step-by-step explanation:
Total problems = 29
x + y = 29
Total marks for 5 point problems = 5*x = 5x
Total marks for 2 point problems = 2*y = 2y
Total marks = 100
5x + 2y = 100
Answer: V = 311.0
Step-by-step explanation:
Formula: 


V = 311.02
V = 311.0
Let's equate the congruent sides.

Now, the segment EF is equal to the segment CD: