Question

check my work

Answer 1

1.d
2.a
3.c
4.c
5.d
6.d
7.a
8.c
9.b
10.a
11.a
12.a
13.a
14.b
15.d
16.b
17.16
18.c
19.b
20.a
21.b
22.a
23.b

Answer 2

Question 1 (Multiple Choice Worth 3 points)

[9.01] What is the value of the coefficient "b" when the quadratic equation y = (3x − 5)(2x + 3) is written in standard form?

19

6

−15

−1

Question 2 (Multiple Choice Worth 4 points)

[9.02] Solve x2 − 4x = 12.

x = −3, x = 4

x = 3, x = −4

x = 6, x = −2

x = −6, x = 2

Question 3 (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 25?

No real solutions

Two identical rational solutions

Two different rational solutions

Two irrational solutions

Question 4 (Multiple Choice Worth 4 points)

[9.05] What are the approximate solutions of 3x2 − 5x = 3 rounded to the nearest hundredth?

No real solutions

x ≈ −1.41 and x ≈ 6.41

x ≈ −0.47 and x ≈ 2.14

x ≈ −2.14 and x ≈ 0.47

Question 5 (Multiple Choice Worth 3 points)

[9.05] How many and of what type are the solutions to x2 + 9x + 10 = 0?

No real solutions

Two identical rational solutions

Two different rational solutions

Two irrational solutions

Question 6 (Multiple Choice Worth 3 points)

[9.06] Using graphing technology, approximate where the graph of y = 5x2 − 3x − 9 crosses the x-axis.

(1.55, 0) and (−1.15, 0)

(1.23, 0) and (−1.26, 0)

(1.32, 0) and (−1.01, 0)

(1.68, 0) and (−1.08, 0)

Question 7 (Multiple Choice Worth 4 points)

[9.05] What are the exact solutions of x2 − 3x − 1 = 0?

x = the quantity of negative 3 plus or minus the square root of 13 all over 2

x = the quantity of 3 plus or minus the square root of 13 all over 2

x = the quantity of negative 3 plus or minus the square root of 5 all over 2

x = the quantity of 3 plus or minus the square root of 5 all over 2

Question 8 (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 9 (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 10 (Multiple Choice Worth 3 points)

[9.05] Identify the graph of a quadratic equation with two irrational solutions.

u-shaped graph opening up and crossing the x-axis at approximately (−2.41, 0) and (0.41, 0)

u-shaped graph opening up and crossing the axis at (−3, 0) and (1, 0)

u-shaped graph opening down and touching the axis at (−2, 0)

u-shaped graph opening down and not crossing the axis.

Question 11 (Multiple Choice Worth 4 points)

[9.01] Identify the vertex for the graph of y = −3x2 + 6x − 2.

(1, 1)

(−1, 1)

(1, −5)

(−1, −5)

Question 12 (Multiple Choice Worth 4 points)

[9.05] Solve 2x2 + 5x + 5 = 0. Round solutions to the nearest hundredth.

No real solutions

x ≈ −3.27 and x ≈ 0.77

x ≈ −2.98 and x ≈ −7.02

x ≈ −0.77 and x ≈ 3.27

Question 13 (Multiple Choice Worth 4 points)

[9.02] What are the x-intercept(s) of the graph of y + 20 = x2 − x?

(−5, 0) and (4, 0)

(5, 0) and (−4, 0)

(−5, 0) and (−4, 0)

(5, 0) and (4, 0)

Question 14 (Multiple Choice Worth 4 points)

[9.06] Using graphing technology, approximate the solutions of 0.64x2 − 0.28x − 4.8 = 0.

x ≈ −2.62 and x ≈ 2.56

x ≈ −2.53 and x ≈ 2.97

x ≈ −2.78 and x ≈ 2.33

x ≈ −2.61 and x ≈ 2.84

Question 15 (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 16 (Multiple Choice Worth 4 points)

[9.02] 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

Question 17 (Fill-In-The-Blank Worth 5 points)

[9.06] Fill in the missing term so that the quadratic equation has a graph that opens up, with a vertex of
(– 2, – 16), and x intercepts at x = -6 and x = 2. (Do not include the negative sign in your answer.)

y = x2 + 4x − ___

Numerical Answers Expected!

Answer for Blank 1:

Question 18 (Multiple Choice Worth 4 points)

[9.01] The graph of which quadratic equation is shown below?

a u-shaped graph on a coordinate plane that is opening up and has a vertex of (1, −9)

y = x2 − 2x − 8

y = x2 + 2x − 8

y = −x2 + 2x − 8

y = −x2 − 2x − 8

Question 19 (Multiple Choice Worth 3 points)

[9.02] What are the solutions of 5x2 = −15x?

x = 5, x = 3

x = 5, x = −3

x = 0, x = 3

x = 0, x = −3

Question 20 (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 21 (Multiple Choice Worth 4 points)

[9.06] Rebekah kicks a soccer ball off the ground and in the air with an initial velocity of 25 feet per second. Using the formula H(t) = −16t2 + vt + s, what is the maximum height the soccer ball reaches?

9.5 feet

9.8 feet

10.2 feet

10.7 feet

Question 22 (Multiple Choice Worth 3 points)

[9.01] Determine whether the graph of y = 3x2 + 2x − 10 opens up or down and whether it has a maximum or minimum point.

Up; Minimum

Up; Maximum

Down; Minimum

Down; Maximum

Question 23 (Multiple Choice Worth 4 points)

[9.06] A firecracker shoots up from a hill 160 feet high with an initial speed of 105 feet per second. Using the formula H(t) = −16t2 + vt + s, determine how long it will take the firecracker to hit the ground.

7.5 seconds

7.8 seconds

8.1 seconds

8.3 seconds

Answer 3

Download geogebra , or go to mathway.com it will surely help you :)
Gaurente

Answer 4

yeah thats right