Aride on the roller coaster costs 4 tickets while the boat ride only costs 3 tickets. michael went on the two rides a total of 10 times and spent a total of 37 tickets which equation is true?

C is coasters and b are boat rides

4c + 3b = 37
c + b =10

c = 10- b, substitute into the first equatiom
4 (10- b) + 3b = 37
40 - 4b + 3b= 37
40 -b= 37
-b = -3
b= 3
now substitute into second equatiom
c+ 3 = 10
c = 7

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's