5x + 2y = 7....multiply by -3
-2x + 6y = 9
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-15x - 6y = -21 (result of multiplying by -3)
-2x + 6y = 9
---------------add
-17x = - 12
x = 12/17 or 0.7
5x + 2y = 7
5(12/17) + 2y = 7
60/17 + 2y = 7
2y = 7 - 60/17
2y = 119/17 - 60/17
2y = 59/17
y = 59/17 * 1/2
y = 59/34 or 1.7 when rounded <====
1: 3/4 2: 6/8 I’m pretty sure is the answer sorry if I’m wrong
180 - 30 = 150or triangle is isoscele so each base angle is 150 / 2 = 75
Answer:
a=-1/2 step by step solution is attached to this solution
