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lara31 [8.8K]
4 years ago
6

Need help please our math teacher didn’t have enough time to give us the notes to learn this so I am confused

Mathematics
1 answer:
Fudgin [204]4 years ago
4 0

Answers with step-by-step explanation:

1. (7x + x) + 7x

= 7x + 7x + x

= 14x + x

= 15x

2. 5 * (4 * x)

= 5*4x

= 20x

3. 15y + (x + 9y)

= 15y + 9y + x

= 24y + x

4. (6x + 21) + 14

= 6x + 21 + 14

= 6x + 35

5. 3x + 2 + 11x

= 11x+ 3x + 2

= 14x + 2

6. (x + 13y) + 8y

= 13y + 8y + x

= 21y + x

7. (12y + 2x) + 4y

= 12y + 4y + 2x

= 16y + 2x

8. 8 (x4)

= 32x

9. 3 (5x)

= 15x

10. 3x + (7x + 10)

= 3x + 7x + 10

= 21x + 10

11. 5x + (2 + x)

= 6x + 2

12. 4 * x * 10

= 4 * 10 *x

= 40x

13. (x * 12) * 3

= 36x

14. 14x + 9y + 6x

= 20x + 9y

15. 5x + (24 + 14x)

= 19x + 24

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Approximate to the nearest tenth the real zeros of f(x) = –5x3 + 9x2 + 12x + 2.
saul85 [17]
Correct answer is C.

-5 x^3 + 9 x^2 +12 x+ 2=(-5 x-1) \left(x^2-2 x-2\right)
\\
\\\left\{-\frac{1}{5},1-\sqrt{3},1+\sqrt{3}\right\}\to \{-0.2,-0.732051,2.73205\}

Or check if f(0.2) = 0 to eliminate A and B.
Then check if f(-0.5) = 0 to eliminate D.
7 0
3 years ago
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Solve for X. Please help!
Pachacha [2.7K]

Answer:

its 2(x-4)

Step-by-step explanation:

4 0
3 years ago
7. What type of angle pair are LMS and SMN? 1.adjacent angles 2.linear pair 3.complementary angles 4.vertical angles
steposvetlana [31]

In this question we have a diagram given. ANd on the basis of that diagram, we have to find the relationship between angles LMS and SMN.

As we see in the diagram, that these angles are one after another. ANd such angles are known as adjacent angles . So these two angles are adjacent angles .

So out of the four options, the correct option is the first option .

4 0
3 years ago
5. Write x^2 + 8x = -4y - 8 in standard form. Identify the vertex, focus, axis
nikitadnepr [17]

Answer:

The answer to your question is:

Step-by-step explanation:

Data

                                             x² + 8x = -4y - 8

                                             x² + 8x + 16  = -4y - 8 + 16

                                             x² + 8x + 16  = -4y + 8

                                             (x + 4)² = -4(y - 2)

                                             (x + 4)² = 4(-1)(y - 2)

Vertex = (-4, 2)

p =  1

Focus = (-4, 1)

Axis of symmetry  x = -4

Directrix      y = 3

4 0
3 years ago
Coffee is a mixture of water, caffeine and a
Liula [17]

Answer:

The answer to your question is Homogeneous mixture

Step-by-step explanation:

There are two kinds of mixtures

Homogeneous is the mixture in which all in parts are the same, we can not distinguish its components. Ex Mayonnaise

Heterogeneous is the mixture in which we can distinguish some or all of its components. Ex. Pizza

In this example, we can not distinguish the different components of coffee so it is a homogeneous mixture.

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3 years ago
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