SOLUTION: solve the following system of equations algebraically a. y=2x^2+20x+15 and y=7x b. 16=x^2-y-4x and 2y=6x+4 c. y=5x^2+8x-2 and y=2x-3

Algebra ->  Problems-with-consecutive-odd-even-integers -> SOLUTION: solve the following system of equations algebraically a. y=2x^2+20x+15 and y=7x b. 16=x^2-y-4x and 2y=6x+4 c. y=5x^2+8x-2 and y=2x-3      Log On


   

Question 755387: solve the following system of equations algebraically
a. y=2x^2+20x+15 and y=7x
b. 16=x^2-y-4x and 2y=6x+4
c. y=5x^2+8x-2 and y=2x-3
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
solve the following system of equations algebraically
a. y=2x^2+20x+15 and y=7x
Sub for y
7x = 2x^2+20x+15
It's just a quadratic. solve for x
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b. 16=x^2-y-4x
2y=6x+4 --> y = 3x + 2
Sub for y as in a
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c. y=5x^2+8x-2 and y=2x-3
Same again