All categories

3 years ago

Which of the following equations is an example of a quadratic equation?

Mathematics

2 answers:

Anestetic [448]3 years ago

5 0

Answer:

y^2-5. In the quadratic formula there is always an exponent.

Serga [27]3 years ago

4 0

Answer:

y = x^2 - 5.

Step-by-step explanation:

A quadratic equations has a squared variable ( like x^2) as its highest degree.

So it is y = x^2 - 5.

You might be interested in

What is the common difference or common ratio for the sequence: 27, 9, 3, 1, 1/3, ...

lawyer [7]

Answer:

It's dividing by 3 everytime, so 1/3

Step-by-step explanation:

4 0

3 years ago

How do u find the volume of rectangular brick?

Pachacha [2.7K]

Answer:

the answer is to use the formula lxwxh or length x width x height

4 0

3 years ago

Please help I’m about to fail and this quiz will bring my grade up.

konstantin123 [22]

Answer:

first blank: -1

second blank: -7

third blank: -13

fourth blank: - 19

Step-by-step explanation:

hope this helps and please rate my answer!

5 0

3 years ago

Plz help me I need because it’s one of my last assignments for school

Brums [2.3K]

Step-by-step explanation:

straight line = 180 degree

example

1) 2w - 24 + 2w - 40 = 180

4w = 180 + 24 + 40

4w = 244

w = 244/4

.......

2) 13n - 11 +(-9 + 12n)

13n - 11 -9 + 12n = 180

25n -20 = 180

25n = 180 + 20

25n = 200

n = 200/25

.........

8 0

3 years ago

Solve this for Brainliest! See the attachment [Level - GCSE]

madreJ [45]

Answer:

$x = 3 + 4\sqrt{3}$

Step-by-step explanation:

OPQ is a right angle triangle.

Using Pythagoras

$x^{2} + (x+5)^{2} = (x+8)^{2}\\x^{2} + x^{2} + 10x +25 = x^{2} + 16x + 64\\x^{2} + x^{2} - x^{2} + 10x - 16x + 25 - 64 = 0\\x^{2} - 6x -39 = 0$

Using quadratic formula

$x = \frac{-b \± \sqrt{b^{2}-4ac}}{2a}\\x = \frac{-(-6) \± \sqrt{(-6)^{2}-4(1)(-39)}}{2(1)}\\x = \frac{6}{2} \± \frac{\sqrt{192}}{2}\\x = 3 \± \frac{8\sqrt{3}}{2}\\x = 3 \± 4\sqrt{3}$

$x = 3 + 4\sqrt{3} = 9.928(4s.f.)$

$x = 3 - 4\sqrt{3} = -3.928(4s.f.)$ (Length can't be negative)

∴ $x = 3 + 4\sqrt{3}$

3 0

2 years ago

Read 2 more answers