this is a triangle
2007-01-21 10:34:14 · 3 answers · asked by ccutestuff2001 2 in Science & Mathematics ➔ Mathematics
b=4a
c+17=5a
a+b+c=180
solve the system for a,b,c
a + 4a + 5a - 17 = 180
10a = 180+17 and so on....
2007-01-21 10:40:21 · answer #1 · answered by Anonymous · 0⤊ 0⤋
b=4a
c=5a-17
a+b+c=180
Plug in the values for b and c into the third equation, to get that a+4a+5a-17=180 so a=197/10. Plug this back in to the first two to get b=394/5 and c=163/2
2007-01-21 18:42:39 · answer #2 · answered by XelaleX 2 · 0⤊ 0⤋
It is given that
b = 4a
c = 5a - 17
We also know that since this is a triangle,
a + b + c = 180. That is,
a + 4a + 5a - 17 = 180
10a - 17 = 180
10a = 197, therefore
a = 19.7
That makes b = 4a = (19.7)(4)
c = 5a - 17 = 5(19.7) - 17
2007-01-21 18:39:24 · answer #3 · answered by Puggy 7 · 0⤊ 0⤋