Question

please help me | |
v v


Identify the solutions of 3x2 − 7x + 4 = 0.

x = −1 over 3, x = −4

x = 1 over 3, x = 4

x = −4 over 3, x = −1

x = 4 over 3, x = 1

Answer 1

(3x-4)(x-1) x = 4/3 or x=1

Answer 2

thank you so much can you help me solve other one?

Answer 3

sure

Answer 4

on the same on or should i close this one?

Answer 5

this is fine

Answer 6

ok,
] Using graphing technology, approximate the solutions of 0.91x2 − 0.54x − 4.9 = 0.

x ≈ −2.32 and x ≈ 2.56

x ≈ −2.14 and x ≈ 2.44

x ≈ −2.18 and x ≈ 2.53

x ≈ −2.04 and x ≈ 2.64

Answer 7

give me a minute

Answer 8

yes ma' am

Answer 9

OK...I cheated and used a quadratic formula calculator that I found online. The answer is the 4th choice.

Answer 10

ok thank you if this is too much let me know but i have 9 more questions is it ok if you help me do does if you do i will be so greatful and happy please and thank you
(but it is your choice)

Answer 11

I have a few more minutes

Answer 12

ok thank you i will give them to you all at once and you can just give me the answer all at once if it is ok with you

Answer 13

ok

Answer 14

What are the approximate solutions of 2x2 + 5x = 4 rounded to the nearest hundredth?

No real solutions

x ≈ −6.27 and x ≈ 1.27

x ≈ −0.64 and x ≈ 3.14

x ≈ −3.14 and x ≈ 0.64

Question 14 (Multiple Choice Worth 3 points)

[9.02] What are the solutions of 4x2 = −20x?

x = 0, x = 5

x = 0, x = −5

x = 4, x = 5

x = 4, x = −5

Question 15 (Multiple Choice Worth 4 points)

[9.01] Determine whether the graph of y = x2 − 4x + 1 has a maximum or minimum point, then find the maximum or minimum value.

Minimum; (2, -3)

Maximum; (2, -3)

Minimum; (-3, 2)

Maximum; (-3, 2)

Question 16 (Multiple Choice Worth 4 points)

[9.06] A firecracker shoots up from a hill 165 feet high with an initial speed of 110 feet per second. Using the formula H(t) = −16t2 + vt + s, determine how long it will take the firecracker to hit the ground.

7.2 seconds

7.5 seconds

7.8 seconds

8.1 seconds

Question 17 (Multiple Choice Worth 3 points)

[9.05] How many and of what type are the solutions of a quadratic equation when the value of the radicand is 0?

No real solutions

Two identical rational solutions

Two different rational solutions

Two irrational solutions

Question 18 (Multiple Choice Worth 4 points)

[9.02] Where does the graph of y = 2x2 − 5x + 3 cross the x-axis?

(−1 over 2, 0) and (−3, 0)

(1 over 2, 0) and (3, 0)

(3 over 2, 0) and (1, 0)

(−3 over 2, 0) and (−1, 0)

Question 19 (Multiple Choice Worth 3 points)

[9.01] Which equation is a quadratic equation?

y + 7 = −3x(4 − x) + 9x

y = −2x + 5

y + 2x3 = (2x − 2)(x + 5)

y − 9x = (x2 + 1)(5x − 1) + 3

Question 20 (Multiple Choice Worth 3 points)

[9.06] Katie wants to hang a painting in a gallery but the painting and frame must have an area of 45 square feet. The painting is 6 feet wide by 7 feet long. The frame must have an equal width of x on each side. Which quadratic equation represents the area of the painting and frame combined?



4x2 + 26x + 45 = 0

4x2 + 26x − 3 = 0

x2 + 13x − 3 = 0

x2 + 13x + 45 = 0

Question 21 (Multiple Choice Worth 3 points)

[9.01] Determine whether the graph of y = −2x2 + 7x − 10 opens up or down and whether it has a maximum or minimum point.

Up; Maximum

Up; Minimum

Down; Maximum

Down; Minimum

Question 22 (Multiple Choice Worth 4 points)

[9.01] Identify the vertex for the graph of y = −2x2 − 12x + 5.

(3, −13)

(−3, −13)

(−3, 23)

(3, 23)

Question 23 (Multiple Choice Worth 4 points)

[9.05] What are the exact solutions of x2 + 5x + 2 = 0?

x = the quantity of negative 5 plus or minus the square root of 33 all over 2

x = the quantity of 5 plus or minus the square root of 33 all over 2

x = the quantity of negative 5 plus or minus the square root of 17 all over 2

x = the quantity of 5 plus or minus the square root of 17 all over 2

Answer 15

the first one is x=0.64 or x = -3.14 (last choice)

Answer 16

9.02 x = 0 or x = -5 second choice

Answer 17

9.01 minimum (2,-3)

Answer 18

thank you so much are you still working on the rest ma'am?

Answer 19

Don't know about the velocity problem

Answer 20

9.05 is the second answer --2 identical rational solutions

Answer 21

9.02 (3/2,0)(1,0) 3rd one

Answer 22

thank you so far so good!!!

Answer 23

9.01 not sure--I'd guess the 2nd one

Answer 24

ok

Answer 25

9.01 maximium and down

Answer 26

oh actually for the one you guessed on is the first one thnx anyways

Answer 27

9.01 (-3,23)

Answer 28

the last problem--3rd choice

Answer 29

thank you so much ma'am

Answer 30

you're welcome. Good luck