Mathematics High School

Susie is solving the quadratic​

Susie Is Solving The Quadratic

Answers

Answer 1

Answer:

Option (D)

Step-by-step explanation:

Standard equation of a quadratic function is,

ax² + bx + c

Comparing this function with the given quadratic function,

f(x) = 2x² - 4x - 3

a = 2, b = -4 and c = -3

By using quadratic formula to get the value of x,

x = [tex]\frac{-b\pm \sqrt{b^2-4ac} }{2a}[/tex]

  = [tex]\frac{-(-4)\pm \sqrt{(-4)^2-4(2)(-3)} }{2(2)}[/tex]

  = [tex]\frac{4\pm\sqrt{16+24}}{4}[/tex]

  = [tex]\frac{-4\pm \sqrt{40}}{4}[/tex]

  = [tex]\frac{-2\pm \sqrt{10}}{2}[/tex]

Therefore, Susie made a mistake in step IV.

Option (D) is the answer.

Related Questions

Select Correct Answer From Drop Down Menu

Answers

Answer:

Solution  (-3, -5)

systems or linear equations

y = x - 2

y = 3x + 4

Step-by-step explanation:

-2,-2 ( 0,4

marissa dance studio charge a monthly fee

Answers

Answer:

Step-by-step explanation: The slope is 10 because when x moved positive 2, y moved positive 20 so y = 10x + b and you can just pick one point that the line crosses so I will use (2, 40) so when you put that in the equation it is 40 = 20 + b so b is 20. The answer is y = 10x + 20

Answer:

This question is incomplete so I can not answer this

Step-by-step explanation:

Because the question is incomplete

4 * 8-5 =12 symbols to make true number sentences

Answers

Using Pedmas  to get the equation to be true add parenthesis around the 8-5:

4 x (8-5) = 12

This becomes 4 x 3 = 12 which is true.

4x3 =12; true . 4x (8-5)=12

I really need help on this

Answers

Since the triangles are similar, a proportion can be made.
12 = 3 * ? and 20 = ? * ?
We know that 3 * 4 = 12, so the proportion must be by 4.
Replace 4 into one of the question marks in 20 = ? * ?.
20 = 4 * ?
We know that 4 * 5 = 20, so x must equal 5.
Your answer is 5.

Tessa's class had a math exam

Answers

Answer:

is dis a question. .......?????

A bar graph titled Internet Users has Region on the x-axis and People (millions) on the y-axis. Asia has 1,000, Europe has 500, North America has 250, and the Middle East has 100.
According to some sources, the African continent has about 170 million Internet users. According to the bar graph, which statement is true?
Africa has fewer users than the Middle East.
Africa has more users than Asia.
Africa has more users than Europe but fewer than Asia.
Africa has more users than the Middle East but fewer users than North America.

Answers

Answer:

Its D) Africa has more users than the Middle East but fewer users than North America.

Step-by-step explanation:

correct for Edge2020

Please HELP ME Ill GIVE BRAINLIEST!!!

A kennel in Bloomington offers daily boarding for dogs. The table below has the cost for different intervals. Which equation best represents this functional relationship?

Answers

Step-by-step explanation:

The patter is multiplying buy 20 after each number.

If a sprinkler waters 1 over 14 of a lawn in 1 over 2 hour, how much time will it take to water the entire lawn?

1 over 7 hour
4 over 7 hour
4 hours
7 hours

Answers

Answer:

7 hours

Step-by-step explanation:

2 divided by 14

i hope this helped

Answer:

7 hours

Step-by-step explanation:

Find the Midpoint of the coordinates (-1,4) and (5,7)

Answers

Answer:

[tex](2,\frac{11}{2})[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Midpoint Formula: [tex](\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})[/tex]

Step-by-step explanation:

Step 1: Define

Endpoint (-1, 4)

Endpoint (5, 7)

Step 2: Find midpoint

Substitute:                    [tex](\frac{-1+5}{2},\frac{4+7}{2})[/tex]Add:                              [tex](\frac{4}{2},\frac{11}{2})[/tex]Divide:                          [tex](2,\frac{11}{2})[/tex]

Answer:

(2 , 5.5)

Step-by-step explanation:

Use the midpoint formula

A pencil holder shaped like a triangular prisms height is 12 cm, and the volume of the pencil holder is 216 cm3. What is the area of the base of the pencil holder in square centimeters

Answers

Answer:

The area of the base of the pencil holder in square centimeters is  18 square centimeters

Step-by-step explanation:

The volume of a triangular prism is given as base area X height.

To get the base area, we can quickly shuffle the order of the terms to make sure that the base area is the subject of the formula.

Base area = volume of prism / height

Base area = 216/12 = 18 square centimeters

Therefore, the area of the base of the pencil holder in square centimeters is = 18 square centimeters

PLEASE HELP ASAP!??!?!? THERE IS 4 PAGES

Answers

Answer:

I am sorry but is the last time I can help you!

I wish you all the best!

At the bookstore, Tim bought a magazine for $4, and five books that all cost the same amount. He spent a total of $129. Which equation expresses how much each book cost?

Answers

Answer:

25(b) + 4 = 129

Step-by-step explanation:

b=5

25(5) + 4=129

f 9 liters of water is shared equally between 4 people, how many liters of water does each person get

Answers

Answer: Each person gets 2.25 liters.

Step-by-step explanation:

Given: Total quantity of water = 9 liters

Number of persons = 4

Quantity of water each person get = [tex]\dfrac{\text{Total quantity of water }}{\text{Number of persons }}[/tex]

[tex]=\dfrac{9}{4}\text{ liters}\\\\=2.25\text{ liters}[/tex]

Hence, each person gets 2.25 liters.

Find the slope of the line that passes through (5,2) and (9,6).

Answers

Answer:

1

Step-by-step explanation:

slope m=y2-y1/X2-x1

=6-2/9-5

=4/4= 1

help me ohmygod plz this is due tonight. thanks :)

Answers

Answer:

Page 1

a) plane ABC or plane ABF (really any combo of A, C, B, and F since they all lie on the plane)

b) B, C, F

c) A or B (they both lie on the same line)

d) AC or BC or AB (all variations of the same line)

Page 2

1)perpendicular

2) perpendicular

3) parallel

Page 3

a) ∠RQS and ∠SQR

b)∠TQR and ∠RQT

c) point Q

Hope this helps :))

a line passes through the point (-1,5) and the point (3,5), what is the equation of the line?​

Answers

Answer:

8

Step-by-step explanation:

took the test

have a nice day

mark brainlist plzzzzz

PLEASE HELP ME!!!!
What is the domain and range of the relation shown in the table?

Answers

Answer:

the answer is c

Step-by-step explanation:

good luck

Answer:

last option

Domain: -3,-1,2,5    Range: 0,2,4

It may be the one above it but you have to be careful because it might say that 0 is a real number or it is not. Fair warning!

Step-by-step explanation:

The domain is the x values and the range is the y values.

Hope this helps!

write the equation of the horizontal line that goes through (-5,7)

Answers

Answer:

The equation would be y=7

Can someone help me fast!!!!!!! Plz

Answers

Answer:

7 1/3

Step-by-step explanation:

A haircut cost $15. I left a 20% tip. How much was the haircut including the tip? PLEASE ANSWER WITH WORK

Answers

Answer:

$18

Step-by-step explanation:

15*.2=3

15+3=18

The haircut is $18 with tip included.

Answer:

$18

Step-by-step explanation:

15 haircut tip 20%

15 x .20= 3

15 + 3 =  18

divide the percent by 100 to get it in decimal form.

PLEASE HELP EXPLAIN MEHOW TO SOLVE THIS I WILL GIVE THE BRAINLIEST

Answers

Answer:

D

Step-by-step explanation:

We require to calculate the circumference (C) of the pizza

C = 2πr ( r is the radius )

here r = 10, then

C = 2π × 10 = 20π

Now divide the circumference by 4, for number of pieces, that is

number of pieces = [tex]\frac{20\pi }{4}[/tex] = 5π ≈ 15.7073...

Thus 15 full pieces can be cut from the pizza

Given X = {15, 22, 33, 44, 89, 165, 1025} and Y = {-5, 15, 33, 88, 99, 150, 160, 1025}, which of the following statements is false?

Ø (X Y)
X Y = {-5, 15, 22, 33, 44, 89, 99, 150, 160, 165, 1025}
X ∩ Y = {15, 33, 1025}

WHAT EVEN IS THIS LOL

Answers

Answer:

the first one

Step-by-step explanation:

in the first one it says there are no common numbers between x and y which is false.

in the second one its the union of x and y which means that you must list all numbers in x and y without repetition

the third one states that 15,33,1025 are the only numbers that are common between x and y.

so as a breif the first one is wrong

Answer:

first choice

Step-by-step explanation:

At a concession stand, 9 slices of pizza and 5 soft pretzels cost $33.25. If 4 slices of pizza and 6 soft pretzels cost $19.50, what is the cost of a soft pretzel?

Answers

The cost of the soft pretzel is $1.25

Plsss help I’ll give u brainlest and 5 or 10 points

Answers

Answer:

I think it’s c

Step-by-step explanation:

Blank% of 35 = 21 percent equations

Answers

Answer:

60%

Step-by-step explanation:

60% of 35  = 21

Starting at (0,0) if you were to go up 7 units and left 4 what coordinates would you end up at? What quadrant would you be in

Answers

Answer:

(-4,7) and the 2nd quadrant

Step-by-step explanation:

hope this helped

Answer:

Quadrant 2.

Step-by-step explanation:

The quadrants on a graph count counterclockwise.

What is the cost of the bill if a drink costs $3, a meal costs $20, an appetizer costs $5.50 and a slice of cake cost $3. 75?​

Answers

32.25 is the cost of the bill

Help me please, i need to get my grade up from a 28 in my class

Answers

Answer:

y = f(x+3) - 5.

Step-by-step explanation:

In general, the equation y = f(x-h) + k shifts the graph of f(x) h units to the right and k units upward. This graph shifts f(x) 3 units to the left (-3 units to the right) and 5 units downward (-5 units upward).

Therefore, the equation for the shifted graph is y = f(x-(-3)) + (-5), or simply y = f(x+3) - 5.

Simplify 1/2+2/3-1/4

Answers

Answer:

11/12

Step-by-step explanation:

6 times a number x minus 3 is less than 15.

Answers

Answer:

6x - 3 < 15

Step-by-step explanation:

6x - 3 < 15

Hope this helps!!!

Happy holidays!

You’re answer would be 6x - 3 < 15
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