How is this solved 2x²+5x+7=20
2 answers:
You’d use the quadratic formula:
X= -b +- √b^2-4ac
———————-
2a
And I attached your final answers
Answer:
you would have to use repletion
Step-by-step explanation:
2x^2+5x+7=20
-7 -7
2x^2+5x=13
/5 /5
2x^2+x=2.6
4+2x=2.6
-4 -4
2x=-1.4
/2 /2
x=-0.7
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8 kilometers is the answer
Hope this helps!:)
Answer: x=42
Step-by-step explanation: In the picture
It's 180 inches of wrapping paper.
the radius: r^2 = 81
r =9
c = 2*pi*r
= 2 * pi * 9
= 18 *pi
Answer: 18*pi or approximately 56.62
