Question

If 8p = -2X2 - 100, which of the following could X possibly be?

Answer 1

HI!!

Answer 2

is it
\[8p=-2x^2-100\]?

Answer 3

Yes mam!

Answer 4

so i guess your job is to solve for \(x\) right?

Answer 5

Thanks for the help @misty1212 greatly appreciate it. And yes find X

Answer 6

maybe start with
\[8p+100=-2x^2\] then divide by \(-2\) and get
\[-4p-50=x^2\]

Answer 7

last step would be to take the square root and get
\[x=\pm\sqrt{-4p-50}\]

Answer 8

That's not a answer choice :9 This is so confusing.

Answer 9

can you post a screen shot?

Answer 10

or give the choices?

Answer 11

x = -8p - 100 over 2

Answer 12

How did you get that!?

Answer 13

it it wrong
we need a screen shot or sommat

Answer 14

http://gyazo.com/0238f2b09b590917c2e11614eaf83973

Answer 15

lol the idiots did not bother to divide by 2!!!

Answer 16

go with C

Answer 17

Thanks!!! Few more?

Answer 18

sure i hope they get better

Answer 19

Solve 3x2 + x + 10 = 0. Round solutions to the nearest hundredth.

I got no real solutions but idk.

Answer 20

no real solution looks good

Answer 21

shes right

Answer 22

Thanks @LesTwins

Answer 23

Derek kicks a soccer ball off the ground and in the air, with an initial velocity of 31 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

Answer 24

is it really 31, or could it be 32?

Answer 25

idk -_- @satellite73

Answer 26

i am asking if you made a typo is all
it would be tons easier if it was "initial velocity of 32" instead of "31"

Answer 27

31

Answer 28

ok then if it is 31 it is 31
first coordinate of the vertex of \(y=ax^2+bx+c\) is \(-\frac{b}{2a}\) which, in your case, is
\[-\frac{31}{2\times( -16)}=\frac{31}{32}\]

Answer 29

if it was initial velocity of 32 you would get a 1, which would be a lot easier to deal with, but whatever
now you have to compute
\[h(\frac{31}{32})\]

Answer 30

i would use a calculator
http://www.wolframalpha.com/input/?i=-16%2831%2F32%29%5E2%2B31%2831%2F32%29

Answer 31

at max height H(t)=0
-32t+v=0
t=v/32
t=31/32
H(31/32)=-16(31/32)^2+31*31/32
= 15

Answer 32

tahnks <3

Answer 33

Last one
A toy rocket was launched from the ground. The function f(x) = -16x2 + 128x shows the height of the rocket f(x), in feet, from the ground at time x seconds. What is the axis of symmetry of the graph of f(x), and what does it represent?

Answer 34

@satellite73 pls