Use the quadratic formula to find the x-intercepts of the function. Round to the nearest tenth if necessary.
y = -2x2 + 5x - 1
A. {2.3, 0.2}
B. {2.2, -5.8}
C. {-9.2, -0.8}
D. no real solution

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- anonymous

\[\frac{5\pm\sqrt{17}}{4}\]

- anonymous

best answer is A

- anonymous

Hmmm alright (: Thanks!!!

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## More answers

- anonymous

Can you help me on like my last 6 questions?

- anonymous

i just computed first by quadratic formula, then plug in to calculator

- anonymous

ok shoot

- anonymous

pleaseeeeee? u dont have to.. but i would like it!

- anonymous

i am ready, lets do it.

- anonymous

Solve, using the square root method: 5x2 = 60. Round the solution to the nearest tenth.
A. {3.5, -3.5}
B. {7.7, -7.7}
C. {3.5}
D. No real solution

- anonymous

(: So generous!! :D

- anonymous

3.5, -3.5

- anonymous

5 to go

- anonymous

A?

- anonymous

A

- anonymous

Okay next one
Solve using the square root method. Round to the nearest tenth if necessary.
x2 + 15 =0
A. {3.9}
B. {3.9, -3.9}
C. {7.5, -7.5}
D. no real solution

- anonymous

no real solution since
\[x^2=-15\] has no real answer

- anonymous

4 to go

- anonymous

OKay so D
Next one
Which number completes the perfect square trinomial?
x2 + 20x + ?
A. 40
B. 100
C. 25
D. 80

- anonymous

100

- anonymous

(:

- anonymous

half of 20 is 10, 10 squared is 100

- anonymous

3 more

- anonymous

Okay (:
Use the quadratic formula to solve the problem.
A soccer player throws the ball onto the field from the sideline. An equation modeling the ball's flight is h = -16t2 + 18t + 2. In how many seconds will the ball reach the ground?
A. in about 2 seconds
B. in about 1.2 seconds
C. in about 1.8 seconds
D. Cannot be determined

- anonymous

set
\[-16t^2+18t+2=0\]
solve for t

- anonymous

B

- anonymous

about 1.2

- anonymous

Haha yea alright (: Thanks soooo much btw (:
Next..
Which of the following shows the square completed in the this equation?
x2 + 3x - 5 = 0
A. (x + 9)2 = 14
B. (x - 3)2 = 8
C. (x + 1.5)2 = 7.25

- anonymous

this is nonsense by the way unless he throws it straight up in the air. if he throws it out on the field equation makes no sense

- anonymous

C

- anonymous

Yea... thats true!!

- anonymous

one more?

- anonymous

2 more! here they are
Solve the following using the quadratic formula. Round to the nearest tenth if necessary.
2x2 + 9x + 4 = 0
A. {-4, -0.5}
B. {-16, -2}
C. {-8, -1}
D. no real solution
Use the quadratic formula to find the zeros of the function y = 2x2 + 3x + 6. Round to the nearest tenth if necessary.
A. {-1.7, 2.3}
B. {-2.4, 2.4}
C. {-2.3, 0.8}
D. no real solution

- anonymous

ohh u dont have to do the last one then if u dont want to (:

- anonymous

i miscounted my bad! ^^

- anonymous

first one is A, -4 and -.5

- anonymous

no problem we do the last one now

- anonymous

Okay (:

- anonymous

ahww thanks!! =3

- anonymous

no solution

- anonymous

OKay (: OMFG i could seriously stalk you right now!!! (lmfao) I got another 100%
I am totally getting it back to a B!!!! And its all thanks to youuuuuuuuu!!! <3

- anonymous

are you taking this on line?

- anonymous

Yep!! (; Haha

- anonymous

way to go!

- anonymous

Its hard as hell!!!

- anonymous

how can you miss? just ask and you get the answers.

- anonymous

and now i am done for the evening. gnight!

- anonymous

Ikr!! haha i usually get those ppl who only want metals :P And they give me wrong answerssss..... and okay thanks sooooooooooooooooooooo much!!!!!! (: Hope i see u again!! (:

- anonymous

ok maybe tomorrow.

- anonymous

very welcome.

- anonymous

(:

- anonymous

:)

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