19. the first side of a triangle measures 4in less than the second side, the third side is 3 in more than the first side, and th
e perimeter is 15 in. how long is the third side
please help it’s late and i already started the test and my head hurts
1 answer:
Answer:
the third side is 5 2/3 in.
s - 1
Step-by-step explanation:
a = side 1
b = side 2
c = side 3
a + b + c = 15
a = b - 4 => b = a + 4
c = a + 3
a + a + 4 + a + 3 = 15
3a + 7 = 15
3a = 8
a = 8/3 = 2 2/3 in
b = a + 4 = 6 2/3 in
c = a + 3 = 5 2/3 in
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