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IRISSAK [1]
3 years ago
14

Simplify the expression: -3(2h + -5h^2) + 2h

Mathematics
1 answer:
Damm [24]3 years ago
5 0

Answer:

15h² -  4h

Step-by-step explanation:

-3(2h + -5h²) + 2h

-3(2h - 5h²) + 2h

(-3*2h -3*-5h²) + 2h

-6h + 15h² + 2h

-4h + 15h²

-6h

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2 years ago
For which values of c does the following polynomial have two complex roots? X^2+4x+C
Grace [21]

For this case we have that by definition, the discriminant of a quadratic expression is given by:

d = b ^ 2-4 (a) (c)

If the discriminant is less than zero then the expression has two different complex roots.

In this case we have the following expression:

x ^ 2 + 4x + c

So we have to:

a = 1\\b = 4\\c = c\\

The discriminant is given by:

d = 4 ^ 2-4 (1) (c)\\d = 16-4c

Then, if we want two complex roots it must be fulfilled that:

16-4c

Thus, the expression has two complex roots for all values greater than 4.

ANswer:

c> 4

5 0
3 years ago
Anyone know how to do these?
Allushta [10]

Answer:

1.4x10^-7

Step-by-step explanation:

For Problem 6

First we would divide the first numbers together so 7.84 / 5.6 = 1.4

We then would add the exponenites together so -3+-4=-7

Leading our awnser to be 1.4x10^-7

6 0
3 years ago
In the figure below, what is the value of x
kykrilka [37]

Answer:

<em>x = 49°</em>

Step-by-step explanation:

<u>Angles in a Triangle</u>

The sum of the internal angles in any triangle adds up to 180°.

The figure shows a triangle that includes two angles with the same tick mark. This means they are congruent, i.e. they measure the same.

The larger triangle has three defined angles: 43°, 39°, and 2x. Since the sum of them is 180°:

43° + 39° + 2x = 180°

Operating:

82° + 2x = 180°

Subtracting 82°:

2x = 180° - 82° = 98°

x = 98°/2 = 49°

x = 49°

3 0
2 years ago
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