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const2013 [10]
3 years ago
8

Consider the expression 5a + (-4b), where bis a negative number and a

Mathematics
1 answer:
Leona [35]3 years ago
6 0

The sum is negative.

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Explain why a quadratic equation with a positive discriminant has two real solutions, a quadratic equation with a negative discr
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Answer:

A quadratic equation can be written as:

a*x^2 + b*x + c = 0.

where a, b and c are real numbers.

The solutions of this equation can be found by the equation:

x = \frac{-b +- \sqrt{b^2 - 4*a*c} }{2*a}

Where the determinant is D = b^2 - 4*a*c.

Now, if D>0

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√D = R

then the solutions are:

x = \frac{-b +- R }{2*a}

Where each sign of R is a different solution for the equation.

If D< 0, we have the square root of a negative number, then we have a complex component:

√D = i*R

x = \frac{-b +- C*i }{2*a}

We have two complex solutions.

If D = 0

√0 = 0

then:

x = \frac{-b +- 0}{2*a} = \frac{-b}{2a}

We have only one real solution (or two equal solutions, depending on how you see it)

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3 years ago
Han can run 100 meters in 20 seconds how long will it take him to run 3000 metres
Juliette [100K]

Answer:

600 seconds

Step-by-step explanation:

In this case we have to calculate the speed;

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Speed = 100/20 = 5 mph

Next to get our answer we have to calculate the amount of time

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In ΔMNO, m = 50 cm, o = 35 cm and ∠O=83°. Find all possible values of ∠M, to the nearest degree.
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No solution

Step-by-step explanation:

I got it right on delta math, just dont write anything and turn that in and it should be correct.

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