3 years ago

Can someone help me w this question plz.

1 answer:

6 0

For any solution it follows that y=y so:

x^2+2x=3x+20 subtract 3x from both sides

x^2-x=20 subtract 20 from both sides

x^2-x-20=0 factor...

x^2-5x+4x-20=0

x(x-5)+4(x-5)=0

(x+4)(x-5)=0

x=-4 and 5 now to find the corresponding y values I'll use y=x^2+2x

y(-4)=16-8=8 and y(5)=25+10=35 so the two solutions are the points:

(-4, 8) and (5, 35)

You might be interested in

four people in abes family are traveling to Canada for their vacation.They have four seats in the center section of the plane.Ab

melamori03 [73]

I think 12. I'm not sure though. The way I came up with that answer is the tree diagram. I used the numbers 1, 2, 3, 4, . Then I did the tree diagram method.

3 0

3 years ago

9.The following set represents a set of rational numbers: {12.6,11/15,___,0} which could be the missing value in the set?

scoray [572]

Answer:

$\sqrt {196}$