Quadratic Simultaneous Equations

Question 1:

y=x213x10 y=2x7
x=15.2 or -0.197 y=23.4 or -7.394

Question 2:

y=2x2+15x+10 y=2x7
x=-1.81 or -4.69 y=-10.62 or -16.38

Question 3:

y=3x213x9 y=x+7
x=5.62 or -0.95 y=12.62 or 6.05

Question 4:

y=2x213x2 y=x+3
x=7.34 or -0.341 y=10.34 or 2.659

Question 5:

y=3x2x8 y=2x6
x=1.46 or -0.457 y=-3.08 or -6.914

Question 6:

y=x2+7x+5 y=3x+7
x=0.449 or -4.45 y=8.347 or -6.35