Question

HELP I NEED AN ANSWER!!

Answer 1

`1)2 ~real ~ solutions`

`2) 0 ~ real ~solutions`

`3) 1~real ~solutions`

Step-by-step explanation:.

`1) x^2+y^2=17`

`y=-1/2x`

`x^2+1/4x^2=17`

`4x^2+x^2=68`

`5x^2=68`

`x^2=68`

`x=` ±
`√(68/5)`

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`2) y=x^2-7x+10`

`y=-6x+5`

`-6x+5=x2-7x+10`

`x^2-x+5=0`

`a=1`

`b=-1`

`c=5`

`D=b^2-4ac`

`=1-20`

`=-19`

`√(0) =√(-19)`

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`3) y=-2x^2+19`

`8x-y=-17`

`8x+2x^2-9=-17`

`8x+2x^2+8=0`

`4x+x^2+4=0`

`x^2+4x+4=0`

`x^2+2x+2x+4=0`

`x(x+2)+2(x+2)=0`

`(x+2)(x+2)^2=0`

`(x+2)^2=0`

`x=-2`

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hope it helps...

have a great day!!!