Question

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

Answer 1

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

Answer 2

best answer is A

Answer 3

Hmmm alright (: Thanks!!!

Answer 4

Can you help me on like my last 6 questions?

Answer 5

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

Answer 6

ok shoot

Answer 7

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

Answer 8

i am ready, lets do it.

Answer 9

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

Answer 10

(: So generous!! :D

Answer 11

3.5, -3.5

Answer 12

5 to go

Answer 13

A?

Answer 14

A

Answer 15

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

Answer 16

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

Answer 17

4 to go

Answer 18

OKay so D

Next one

Which number completes the perfect square trinomial?

x2 + 20x + ?

A. 40
B. 100
C. 25
D. 80

Answer 19

100

Answer 20

(:

Answer 21

half of 20 is 10, 10 squared is 100

Answer 22

3 more

Answer 23

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

Answer 24

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

Answer 25

B

Answer 26

about 1.2

Answer 27

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

Answer 28

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

Answer 29

C

Answer 30

Yea... thats true!!

Answer 31

one more?

Answer 32

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

Answer 33

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

Answer 34

i miscounted my bad! ^^

Answer 35

first one is A, -4 and -.5

Answer 36

no problem we do the last one now

Answer 37

Okay (:

Answer 38

ahww thanks!! =3

Answer 39

no solution

Answer 40

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

Answer 41

are you taking this on line?

Answer 42

Yep!! (; Haha

Answer 43

way to go!

Answer 44

Its hard as hell!!!

Answer 45

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

Answer 46

and now i am done for the evening. gnight!

Answer 47

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!! (:

Answer 48

ok maybe tomorrow.

Answer 49

very welcome.

Answer 50

(:

Answer 51

:)