Answer:1. y = 2x - 3
2. y= 2x + 3
3. y = -2x + 3
4. y = -2x - 3
Step-by-step explanation:
This is the isosceles right triangle, the diagonal of a square, the thing that so upset the Pythagoreans. The two sides and diagonal of a square are in ratio
so we get

We could have also gotten this using Trig:


Or by recognizing u=v because remaining angle is 45 so this must be isosceles so



Step-by-step explanation:
A. to make the quadrilateral a parallelogram, we have:
7y + 5 = 8y - 4
112 = 10x - 8
<=> y = 5 + 4
120 = 10x
<=> x = 12
y = 9
B.we have:
17 = 4x + 5
63 = 8y - 1
<=> 12 = 4x
64 = 8y
<=> x = 3
y = 8