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
Mekhanik [1.2K]
3 years ago
13

What is the discriminant of the quadratic equation, 4x^2-8x-5=0​

Mathematics
2 answers:
uysha [10]3 years ago
7 0

Answer:

Step-by-step explanation:

4x^2-8x-5=0

The discriminant is the number under the √. In this case it's 144

Gennadij [26K]3 years ago
4 0

Answer:

\Delta=144

Step-by-step explanation:

For a quadratic in standard form, the discriminant is given by:

\Delta=b^2-4ac

We have the equation:

4x^2-8x-5=0

Hence, our a=4; b=-8; and c=-5.

Substituting into our formula, we acquire:

\Delta=(-8)^2-4(4)(-5)

Evaluate:

\Delta=64+80

Add:

\Delta=144

Therefore, our discriminant is 144.

Notes:

Since our discriminant is a positive value, this tells us that our quadratic has two real roots.

You might be interested in
Does anyone know the answer to this question. I already tried A and C.
Archy [21]

I think the answer would have to be D. If the diameter, which is the distance from one point on the circle through the center to another point on the circle, is halved then the amount of concrete that will be needed will be multiplied by 4. I think that's right I am so sorry in advance if that was incorrect. Have a beautiful rest of your day. Stay safe. C O V I D - 1 9 IS REAL THIS COULD MEAN YOUR LIFE!!!

3 0
2 years ago
A line has a slope of 10 and includes the points (3, n) and (4,0). What is the value of n?<br> n =
ExtremeBDS [4]

Answer:

The value of n = -10  

Step-by-step explanation:

Given the points

  • (3, n)
  • (4,0)

Finding the slope between (3, n) and (4,0)

\left(x_1,\:y_1\right)=\left(3,\:n\right),\:\left(x_2,\:y_2\right)=\left(4,\:0\right)

As slope = 10

using the formula

Slope  =  [y₂ - y₁] /  [x₂ - x₁]

so substituting the values

      10   =  [0 - n] / [4 - 3]

      10   = -n / 1

     10 = -n

     n = -10    

Therefore, the value of n = -10  

8 0
2 years ago
In 2012, the world's largest pumpkin weighed 913 kilograms. An average-sized pumpkin weighs 5,000 grams.
Paladinen [302]
5000 grams is 5 kilograms 913-5= 908
3 0
3 years ago
Read 2 more answers
What is 3/7 as decimal
maksim [4K]

Answer:

0.428571429

Step-by-step explanation:

4 0
3 years ago
There are 100 students at a college who have taken a course in calculus, 110 who have taken a course in discrete mathematics, an
vesna_86 [32]

Answer:

110 students

Step-by-step explanation:

The number of students who have only taken calculus is given by the number of students who have taken calculus minus the students who have taken both classes:

C =100 -50\\C= 50\ students

The number of students who have only taken discrete mathematics given by the number of students who have taken discrete mathematics minus the students who have taken both classes:

D =110 -50\\C= 60\ students

The number of students that have taken a course in either calculus or discrete mathematics is:

E = C+D = 50+60\\E= 110\ students

7 0
3 years ago
Other questions:
  • Stop what your doin and let me waste a minute of your time by letting you help me on this one simple problem please!!!!! ☺︎ ☺︎ ☺
    14·1 answer
  • 4x=500+96.plz send answer fast
    15·1 answer
  • On his first three tests, Hiram got scores of 89, 95, and 90. His final test score brought his median score to 91.5. What was Hi
    13·1 answer
  • *** Find all numbers whose absolute value is 9 ****
    13·1 answer
  • Subtract 1/8 from 5/6
    14·1 answer
  • If 3x+20=2y and x+5=y show that (2,7) is a solution solve by substitution. PLEASE ANSWER ME
    7·2 answers
  • Please answer this correctly
    8·2 answers
  • which quadrilateral always has two pairs of parallel sides, four right angles, and four congruent sides
    14·2 answers
  • Help me pls and thank you
    10·2 answers
  • Multiply the Polynomials:<br><br> (2x+3) (-x+2y-4)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!