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
brilliants [131]
3 years ago
13

Select all of the following that are quadratic equations.

Mathematics
1 answer:
kifflom [539]3 years ago
5 0
A quadratic equation is one in which the highest exponent of x is 2.
7x^2+14x=0 is quadratic; the highest exponent is 2.
x³-3x²+1=0 is NOT quadratic.  The highest exponent of x is 3, not 2.
5x-7=0 is NOT quadratic.  The highest exponent of x is 1, not 2.
x²+3x-5=0 is quadratic; the highest exponent of x is 2.
x-5=9x+7 is NOT quadratic.  The highest exponent of x is 1, not 2.
x²-x=3x+7 is quadratic; the highest exponent of x is 2.
You might be interested in
Help! I can’t find the answer anywhere!
Mashcka [7]

Answer:

wowza

Step-by-step explanation:

that looks hard

7 0
3 years ago
Read 2 more answers
A transformer increases the input voltage from 12V to 12,000V. What is the ratio of the number of wire turns on the primary coil
erma4kov [3.2K]

Answer:

\frac{n_p}{n_s}=\frac{1}{1000}

Step-by-step explanation:

Given voltage of primary coil is V_p=12V

And voltage of secondary coil is V_s=12,000V

A transformer is a device that contains primary and secondary coil. These coils are mounted on soft iron. The change in voltage depends upon the number of turns of primary coil (n_p) and secondary coil (n_s).

Following equation represents the relation between them.

\frac{V_s}{V_p} =\frac{n_s}{n_p}\\\\\frac{12,000}{12}=\frac{n_s}{n_p}\\\\1000=\frac{n_s}{n_p}

Then, ratio of the number of wire turns on the primary coil to the number of turns on the secondary coil is

\frac{n_p}{n_s}=\frac{1}{1000}

5 0
3 years ago
MATH HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
sveta [45]
So the first one, 1.2 >11/5. and the second one 1/3> 1/2
6 0
3 years ago
Read 2 more answers
How to find the area of the base of a cone ​
Gre4nikov [31]

Answer:

Step-by-step explanation:

The base of a cone is simply a circle.

The formula for the area of a circle is A = πr^2.

Example:  What is the area of the base of a cone, if the radius of the base is 5 cm?

Answer:   A = π(5 cm)^2 = 25π cm^2

7 0
3 years ago
What is the rate of change?
Pachacha [2.7K]

Answer:

25m

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is B-CF?
    11·1 answer
  • If f(x)= |x-3|, f(3)=
    14·2 answers
  • Find the totals of the two animals people owned most. What is the sum of these two categories?
    10·1 answer
  • If it is 10:46 am how many minutes until noon?
    10·2 answers
  • A boat moves at a rate of 40 mph in Stillwater if the rivers current flow in a rate of 4 mph how long does it take a boat to tra
    11·1 answer
  • What is the equation of a line...
    12·1 answer
  • A confidence level of 95% means: 95% of the time, sample percentages will fall above the mean. 95% of the time, population data
    5·2 answers
  • X^2 + 6x +15=0 solve the equation using the quadratic formula​
    9·1 answer
  • What is the value of n in the equation 1/2(n-4)-3=3-(2n+3) ?
    8·2 answers
  • What is (1/4)^2x+3=2^5x+4<br> find the value of x?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!