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3 years ago

How do I find roots from a quadratic equation

1 answer:

6 0

Answer:The roots of any quadratic equation is given by: x = [-b +/- sqrt(-b^2 - 4ac)]/2a. Write down the quadratic in the form of ax^2 + bx + c = 0. If the equation is in the form y = ax^2 + bx +c, simply replace the y with 0. This is done because the roots of the equation are the values where the y axis is equal to 0.

Step-by-step explanation:

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If light travels at 3. 108 m/s and its frequency is 6. 1015 Hz, then its wavelength is:

Sergio039 [100]

Answer:

$5 * 10^{-8} m$

Step-by-step explanation:

The speed of light is $3 * 10^8 m/s$ and its frequency is $6 * 10^{15} Hz$ .

The speed of light is given as:

c = λ * f

where λ = wavelength of light

f = frequency of light

Therefore, the wavelength is given as:

λ = c / f

=> λ = $\frac{3 * 10^8}{6 * 10^{15}}$

=> λ = $5 * 10^{-8} m$

The wavelength of the light is $5 * 10^{-8} m$

7 0

2 years ago

Can someone please help me with these last 3 questions? Offering 30 points (10 per question)

suter [353]

10. 4:5....added = 9
4/9 (1800) = 7200/9 = 800 (red)
5/9 (1800) = 9000/9 = 1000 (green)
there were (1000 - 800) = 200 less red ones then green ones.

11. 7/4 = 21/r
cross multiply
(7)(r) = (4)(21)
7r = 84
r = 84/7
r = 12....Rod has 12 stickers

12. 14/4 = 3.5 eggs per cup
for 16 cups...16 * 3.5 = 56 eggs

3 0

2 years ago

How many solutions does the equation have? 17f| = 0

notsponge [240]

Answer:

one answer is the possible answer

hope this helped!

4 0

3 years ago

5 b = - 25 for algebra

san4es73 [151]

Answer:

b= -5

Step-by-step explanation:

because 5x-5=-25

4 0

2 years ago

Read 2 more answers

Solve the equation x + 3x – 7 = 0 Give your answers to 2 decimal places.

forsale [732]

Answer:

x = 1.75

Step-by-step explanation:

7 / 4 = 1.75

x + 3x = 4x

8 0

2 years ago