Question

please help me??what is the solution 2x^2+x+2=0

Answer 1

This is just a simple quadratic :)

Answer 2

(and the question is wrong: you can't have real answers for that question)

Answer 3

one of the answers is x=-1+i squareroot15/2

Answer 4

yep according to wolfram alpha
you'd better check if your teacher has put this down wrongly

Answer 5

alright can you help me with a simple one?

Answer 6

like?

Answer 7

the length of the sides of a rectangular window have a ratio 1.6 to 1. the area of the window is 2,560 square inches. what are the dimensions of the window?

Answer 8

let the short side be x.
the long side is therefore 1.6x.

Answer 9

1.6x^2=2560

Answer 10

i suppose you know how to do then? :)

Answer 11

no i dont

Answer 12

1.6x^2=2560
16x^2=25600
x^2=1600
x=40

Answer 13

40 inches by ??

Answer 14

by 40*1.6=64 inches sorry for not replying

Answer 15

you can use @kc_kennylau next time

Answer 16

thank you:) alright

Answer 17

no problem :)

Answer 18

A football is kicked into the air from an initial height of 4 feet. The heigh in feet of the football avoce the ground is given by s(t)=-16t^2+50t+4 where t in time is seconds and t>=O. At what time will the football be 25 feet above the ground?
A)3.625 seconds
B)3.20 seconds
C)0.5 seconds or 3.625 seconds
D)0.5 seconds or 2.625 seconds

Answer 19

@kc_kennylau

Answer 20

quadratics again :)

Answer 21

lol

Answer 22

-16t^2+50t+4=25

Answer 23

im still confused

Answer 24

this is just quadratic :)

Answer 25

never mind i got it

Answer 26

good :)

Answer 27

Suppose a parabola has an axis of symmetry at x = –7, a maximum height of 4, and also passes through the point (–6, 0). Write the equation of the parabola in vertex form.

Answer 28

http://www.mathwarehouse.com/geometry/parabola/images/standard-vertex-forms.png

Answer 29

ok i don't know much about parabola sorry

Answer 30

its cool thanks

Answer 31

maybe you can ask others? :)