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emmasim [6.3K]
3 years ago
13

What is the discriminant of the quadratic equation 0 = –x2 + 4x – 2?

Mathematics
1 answer:
makvit [3.9K]3 years ago
6 0

Answer:

Discriminant=8

Step-by-step explanation:

-x²+4x-2=0

here a=-1,b=4 and c=-2

Discriminant=b²-4ac

Discriminant=(4)²-4(-1)(-2)

Discriminant=16-8

Discriminant=8

i hope this will help you :)

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Please help me with this thankyou​
DerKrebs [107]
The answer would be 60

The first think you would need to do would simply 144. Which would be 12.

Then you are going to want to multiply-5 by 12.
Which would be 60.
With 12 as a positive number, being greater or to than 60 then will become a positive.
7 0
3 years ago
What is the radius of a sphere with a surface area of 100TCm ?
tensa zangetsu [6.8K]

The radius is 5cm

Step-by-step explanation:

The surface area of a sphere is given by:

SA = 4\pi r^2

Here

Given

SA = 100π cm^2

Putting the values in the formula

100\pi = 4\pi r^2\\r^2 = \frac{100\pi}{4\pi}\\r^2 = 25

Taking square root on both sides

\sqrt{r^2} = \sqrt{25}\\r = 5 cm

The radius is 5cm

Keywords: Surface area, Radius

Learn more about surface area of sphere at:

  • brainly.com/question/1388658
  • brainly.com/question/1386181

#LearnwithBrainly

7 0
3 years ago
Use the equation to complete an algebraic proof that proves the answer is x = 7/6. Write your proof in your journal and upload y
Ivahew [28]

Answer:

x=7/6

Step-by-step explanation:

subtract the 4x from both sides of the equation

(2x+6)-4x=4x-3-4x

find common denominator

(2x+6)/5+(5(-4)x)/5=4x-3-4x

then combine fractions

(2x+6+5(-4)x)/5=4x-3-4x

then multiply the 5&4

(2x+6-20x)/5= 4x3-4x

combine terms

(-18x+6)/5= -3

then multiply everything by 5

-18x+6= -15

subtract the 6 from both sides

-18x= -21

divide -21 by -18

(-21)/(-18)=x

find greatest common multiple (3) and solve

x = 7/6

4 0
3 years ago
Write the percent as a decimal 0.12%
11Alexandr11 [23.1K]
"Percent" means literally per one-hundred so

0.12/100

0.0012
7 0
3 years ago
Which is the most accurate way to estimate 25% of 53?
Alex Ar [27]
You can calculate them out and check which one is the most accurate

so if one of the choices was 1/3 of 50, then you would do:
1/3 in the calculator (should be 0.333...) times 50

And you can compare it with the EXACT number, which is:
0.25*53=13.25

This way you can test all the options
8 0
4 years ago
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