1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
gulaghasi [49]
3 years ago
14

Which of the following functions is quadratic? f(x)=3(x-4)(x+3), f(x)=5^2, f(x)=2/x, f(x)=2x^3+3x^2-5

Mathematics
1 answer:
DENIUS [597]3 years ago
8 0
In B 5^2 = 25. There is no x anywhere.
In C f(x) = 2/x is a function of a reciprocal, not a quadratic.
In D f(x) = 2x^3 + 3x^2 - 5 is a cubic. A cubic is not a quadratic. The highest power of a quadratic is x^2

That leaves A. When you expand the brackets, you get
3(x^2 + 3x- 4x - 12)
2(x^2 - x - 12) when you remove the brackets you get
2x^2 - 2x - 24. The highest power of x is x^2. This is your quadratic.

A<<<< answer.
You might be interested in
How many solutions does the system below have?<br> y=1/2x+1<br> 2y - x = 2
kvasek [131]

Answer:

infinitely many

Step-by-step explanation:

Rewrite these equations as

y = (1/2)x + 1

2y = x + 2

and then solve the second for y:  y = (1/2)x + 1.  Note that these end results are identical.  The two lines coincide; that is, one lies right on top of the other.  Thus, there  are infinitely many solutions.

3 0
3 years ago
Peter bought 9 packs of pencils. Each pack has 10 pencils in it. If he lost 18 pencils, how many pencils
Sindrei [870]

Answer:

a 72

Step-by-step explanation:

9x10=90, so in total he has 90 pencils. if he loses 18 of them that's 90-18 which is 72.

4 0
3 years ago
Can a triangle have two obtuse angle
Dvinal [7]
Nope  It is impossible


4 0
3 years ago
Read 2 more answers
Help please!!!! Best answers!!
Snezhnost [94]
A Probability near 1 Indicates an Unlikely Event . I'm Guessing
8 0
3 years ago
Read 2 more answers
{ x - 3y= -3 &amp; x + y= 5 We are to use the graph to solve the given system of equations, then enter your solution below. I ge
nasty-shy [4]

Answer:

Solution: (3, 2)

Step-by-step explanation:

It's easier to graph when the equation of the lines are in their slope-intercept form, y = mx + b.

<u>x - 3y = -3</u>

-3y = -x - 3

Divide both sides by -3:

\frac{-3y}{-3}  = \frac{-x - 3}{-3}

y = 1/3x + 1

where slope = 1/3

y-intercept = 1

<u>x + y = 5</u>

Subtract x from both sides to isolate y:

x - x + y = - x + 5

y = -x + 5

where slope = -1  

y-intercept, 5

I started by graphing the y-intercepts of each line. Then, I used the slope of each linear equation (rise over run) to plot the next points on the graph. In the attached screenshot of the graph, <u>x - 3y = -3</u> is the blue line, while <u>x + y = 5</u> is the green line. Their intersection occurs at point, (3, 2).

Therefore, the solution is (3, 2).

Please mark my answers as the Brainliest if you find my explanations helpful :)

5 0
3 years ago
Other questions:
  • My answer is 19.2 is it correct ??
    14·2 answers
  • Marina paid $2,000 for a tablet PC after receiving a 25 percent discount. What was the price of the tablet before the discount?
    10·1 answer
  • If the volume of the square pyramid is 40 cubic millimeters, and the length of s is 2 millimeters, what is the length of the alt
    7·2 answers
  • Solve the equation for the unknown variable.
    13·1 answer
  • Time is:
    11·1 answer
  • . Megan is standing 300ft from the Eiffel Tower. The Eiffel Tower is 900 ft tall.
    8·2 answers
  • Bridget and Caroline win some money and share it in the ratio 5:3. Bridget gets £65. How
    15·1 answer
  • Jorge is making 6 large salads
    15·2 answers
  • Enter the symbol (&lt;, &gt;, or =) that correctly completes this comparison.<br> 0.147 0 0.174
    5·1 answer
  • A deep-sea diver dives from the surface to 131 feet below the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!