please help!!!
solve the system by elimination
y=x^2+2
-4x-y=10
Part a: solve the following sytem of equations. round to the nearest hundredth if necessary.
y=-2x+7
y= -x^2-4x+7
Part B: graph the system

Question

please help!!!
solve the system by elimination
y=x^2+2
-4x-y=10
Part a: solve the following sytem of equations. round to the nearest hundredth if necessary. 
y=-2x+7
y= -x^2-4x+7
Part B: graph the system

dumbcow · Answer

are these 2 different systems ?

dumbcow · Answer

with a quadratic equation in the system... i would recommend using substitution, not elimination

radar · Answer

Write each equation in terms of y
y=x^2+2
y=-4x-10      y=y
x^2+2=-4x-10
then we would have x^2+4x+12=0    A quadratic equation which can be solved using the quadratic formula.

anonymous · Answer

so how would i use substitution?

radar · Answer

We have already eliminated y, solve for x.

anonymous · Answer

NO

anonymous · Answer

ok thank you

anonymous · Answer

how do i solve for x?  sorry

radar · Answer

$$-b \pm \sqrt{b ^{2}-4ac}\over 2a$$a=1
b=4
c=12

radar · Answer

plug you values in the equation and solve for x, after obtaining the x values then solve for y using the first equation.

radar · Answer

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