Atriangle has a perimeter of 100 centimeters and one side is 35 centimeters. the other two sides have a ratio of 5: 8. what is the length of the longest side of the triangle?

Side a = 35 cm
side b + c = 100 - 35 cm = 65 cm

b : c = 5 : 8 = 5x : 8x

b + c = 65
5x + 8x = 65
13x = 65
5 = x

b = 5x = 5 × 5 = 25 cm
c = 8x = 8 × 5 = 40 cm >longest side

I’m guessing that the answer is c, but i’m not sure which grid is being talked about. since 5x5= 25 and 3x3= 9 (which there are no answers for). a is not right because while the ratio is the same, 6/25= 0.24 which is equal to 24% not 30%.

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