Answer:
y=20
Step-by-step explanation:
25+15=40
2y=40
40/2=20
y=20
Answer:
b is correct answer
Step-by-step explanation:
hope it helped
Answer:
15 B
16 C
17 A
Step-by-step explanation:
Answer:

Step-by-step explanation:
Let the length of the rectangular part =l
The width will be equal to the diameter of the semicircles.
Area of the Skating Rink= 
Therefore:

Perimeter of the Shape =Perimeter of two Semicircles + 2l

The perimeter of the rink is given as:

Answer:
1 1/3
Step-by-step explanation:
you would take 3x+2y=7 and put y=-3x+11 in place of y so it would be 3x+2×-3x+11=7