Which represents a quadratic functionWhich represents a quadratic function?

Which represents a quadratic functionWhich represents a quadratic function? f(x) = 2x3 + 2x2 – 4 f(x) = –7x2 – x + 2 f(x) = –3x + 2 f(x) = 0x2 + 3x – 3

2 months ago

Solution 1

Guest Guest #10829
2 months ago

Answer:

f(x) = -7x^2 -x +2 represents a quadratic function.

Step-by-step explanation:

A polynomial of degree two is called quadratic function,

Also, degree of polynomial is the highest power of its monomial ( individual term with non zero coefficient ),

Since, f(x) = 2x^3 + 2x^2 -4 has degree 3,

⇒  f(x) = 2x^3 + 2x^2 -4 is not a quadratic function,

f(x) = -7x^2 -x +2 has degree 2,

⇒  f(x) = -7x^2 -x +2 is a quadratic function,

f(x) = -3x+2 has degree 1,

⇒  f(x) = -3x+2 is not a quadratic function,

f(x) = 0x^2 + 3x -3 has degree 1,

⇒  f(x) = 0x^2 + 3x -3 is not a quadratic function,

📚 Related Questions

Question
Let 40 x 55 = n. Which of the choices shown is also equal to n? A) (550 x 40) B) (4 x 50) + (40 x 5) C) (50 x 40) + (50 x 40) D) (10 x 55) + (10 x 55) + (10 x 55) + (10 x 55)
Solution 1
D) (10 x 55) + (10 x 55) + (10 x 55) + (10 x 55)

use distributive rule to factor out 55:
55 (10+10+10+10) = 55×40
Question
Find the volume of a cylinder that has the following dimensions. Do not round your answer. (Use 3.14 for π.) CONVERT M INTO CM
Solution 1

The volume of cylinder is 1962.5 cm^{2}.

To find the volume of a cylinder.

What is mensuration?

The part of geometry concerned with ascertaining lengths, areas, and volumes. Mensuration deals with the size, region, and density of different forms both 2D and 3D.

Given that:

Radius= 5 cm

Height= 0.25 m=25 cm

π=3.14

By the formula of volume of cylinder

Volume=πr^{2} h

TO put the value,

Volume=3.14*5*5*25

Volume=1962.5 cm^{2}

So, the volume of cylinder is 1962.5 cm^{2}.

Learn more about mensuration here:

brainly.com/question/10039505

#SPJ5

Solution 2
Convert .25 M to 25 cm. Then multiply 3.14 X 5 X 5 X 25 = 1962.5 cubic cm.
Question
A class's test scores are normally distributed. If the average score is 60 and the standard deviation is 7, choose the spots where the students scoring below 46 and above 74 lie.
Solution 1

Answer with Step-by-step explanation:

We are given that a  class's test scores are normally distributed with the average score 60.

We know that the curve of a normal distribution is symmetric about its mean.

60-14=46

60+14=74

Hence, the point 46 lies to the left of the mean and 74 lies to the right of mean and the two points have the same function value

(since the graph is symmetric to the left and right of mean i.e. points which are equidistant from the mean have same values)

Solution 2

Answer:

One of the answers I got that was correct was the box on the furthest left.

Step-by-step explanation:

Question
Twice a number divided by 4 is 25
Solution 1
Hoi!

A number = x
"Twice a number" indicates multiplication by 2
"Divided by 4" indicates division
"Is 25" indicates that 25 is the final answer.

Your equation is 2x ÷ 4 = 25

Solution 2
A number is x.
Twice a number is 2x.
Twice a number divided by 4 is 2x/4.
Twice a number divided by 4 is 25    
 2x/4=25
2x=25*4
2x=100
x=100/2
x=50
Number is 50.
Question
membership in a skiing club is expected to grow by 8% per month currently,there are 530 members. in about how many months will membership reach 850 members?
Solution 1

Answer: 6 months

Step-by-step explanation:

Solution 2
7 months 530 times 1.08 continue to multiply your answer by 1.08 until you reach over 850
Question
Use the formulas to find the lateral area and the surface area of the given prism round your answer to the nearest whole number 5.39m 26m 5m 2m the choices for the answer is 322m2 327m2 296m2 342m2 296m2 332m2 322m2 332m2
Solution 1
The Answer is 296m2 342m2
Question
Use formulas to find the lateral and surface are of the given prism the numbers are 5.39m 26m 5m 2m 
Solution 1
3(24) + 2(24) + 5.39(24) = 72 + 48 + 129.36 = 249.36 ~ 249m^2 

Total Surface Area: 
(add to the above) 
2(1/2)(3)(2) = 6m^2 (area of the two triangles) 
6 + 149 = 155m^2 
Solution 2
The correct answer is 6 + 149 = 155m^2! Hope This Helps!

Question
Solve the linear system of equations using the linear combination method. {4x−9y=20 2x−6y=16 Enter your answers in the boxes.
Solution 1
Hello!

4x - 9y = 20
2x - 6y = 16

You first need one of the variables have the same coefficient

We can do this by multiplying the second equation by 2

4x - 12y = 32

Subtract the equations to get rid of x

4x - 9y = 20
4x - 12y = 32

3y = -12

Divide both sides by 3

y = -4

Put y into one of the original equations

2x - 6(-4) = 16

Multiply

2x - -24 = 16

We you subtract a negative it is the same as addding

2x + 24 = 16

Subtract 24 from both sides

2x = -8

Divide both sides by 2

x = -4

The answers are x = -4 and y = -4

Hope this helps!
Question
Solve the system of equations using the substitution method. {2x+8y=4 x=−3y+5 Enter your answers in the boxes.
Solution 1
Hi!
I believe the answer is (14,-3)
have a great day & good luck!
Question
1. ______________ is process that you can do over and over, where each result does not affect the next. Ex. Flipping a coin, rolling dice, choosing a card, etc.
Solution 1

Probability experiment or a trail is process that you can do over and over, where each result does not affect the next

Explanation: Trail is defined as a procedure that can repeated any number of times and the result of one trial does not affect the next. This mean each trail or a probability experiment is independent and not associated with the last result.