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3 years ago

Please help me i really need help please

Mathematics

1 answer:

earnstyle [38]3 years ago

4 0

What do you need help with? I don’t see any questions that I can really answer?

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Is 3/4 less than 1/2 or more than 1/2?

nalin [4]

Answer: more than 1/2

Step-by-step explanation: 1/2 equals 2/4 so 3/4 is more.

4 0

3 years ago

Read 2 more answers

taurus [48]

Answer:

$x^2 - 2x + 10$ , option B

Step-by-step explanation:

Complex numbers:

The most important relation that involves complex numbers is given by:

$i^2 = -1$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

The solutions are:

$x_1 = 1 - 3i, x_2 = 1 + 3i$

We have to find the polynomial. All option have $a = 1$ . So

$(x - (1 - 3i))(x - (1 + 3i)) = x^2 - x(1 + 3i) - x(1 - 3i) + (1 - 3i)(1 + 3i) = x^2 - x -3ix - x + 3ix + 1^2 - (3i^2) = x^2 - 2x + 1 - 9i^2 = x^2 - 2x + 1 - 9(-1) = x^2 - 2x + 10$

The correct answer is given by option b.

6 0

3 years ago

Does 10 24 26 make a right triangle

Len [333]

Answer:

Yes

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

The average age of a preschool class is 4.5 years old. If there is one 3-year-old, five 5-year-olds, and two other children both

kompoz [17]

Answer:

3.1

Step-by-step explanation:

5 x5 =25

25+3=28

8 0

2 years ago

Read 2 more answers

Alvin is 15 years younger than Elga. The sum of their ages is 25. What is Elga’s age

Fynjy0 [20]

Elga is 20 years old and Alvin would be 5. Hope this helped.

4 0

3 years ago