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3 years ago

30 POINTS!!!!!Which of the following expressions has a value that is less than - 1/2 ? Select all that apply.

Mathematics

1 answer:

gulaghasi [49]3 years ago

4 0

Answer:

Step-by-step explanation: uhm idk soooooooooooo

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Explain what the following statement means: Polynomials are closed under the operations of addition and subtraction. Provide one

kirza4 [7]

1. Polynomials are closed under the operations of addition and substraction mean that:

If we add two polynomials, the result is still a polynomial (so still in the set of polynomials)

Also, If we subtract 2 polynomials, the result is a polynomial.

2. Example: given the polynomials :

$M(x)= 3x^{2}+5x-1$ and $N(x)=-6 x^{4}+9 x^{3}+ x^{2} -2x-1$

Addition example:

$M(x)+N(x)=(3x^{2}+5x-1)+(-6 x^{4}+9 x^{3}+ x^{2} -2x-1)=$

$-6 x^{4}+9 x^{3}+x^{2} +3x^{2}-2x+5x-1-1=-6 x^{4}+9 x^{3}+4x^{2}x-2$

Subtraction example:

$N(x)-M(x)=(-6 x^{4}+9 x^{3}+ x^{2} -2x-1)-(3x^{2}+5x-1)$

= $-6 x^{4}+9 x^{3}+ x^{2} -2x-1-3x^{2}-5x+1=$
= $-6 x^{4}+9 x^{3}+ x^{2} -3x^{2}-2x-5x-1+1=-6 x^{4}+9 x^{3}-2x^{2}-x$

So both M(x)+N(x) and N(x)-M(x) are polynomials

7 0

4 years ago

Read 2 more answers

Which answer does NOT correctly describe the graph of y = 5x + 12?

Dafna11 [192]

Answer:

The graph contains the point (5, 12) does NOT correctly describe the graph of y = 5x + 12

Solution:

Given, linear equation in two variable is y = 5x + 12.

We have to select the option that incorrectly describes about given equation.

Now, we have to check one by one option.

a) The line has a constant rate of change.

As the given line is an linear equation it will have constant slope. So this option states correctly

b) The line crosses the y-axis 12 units above the origin

When a line crosses y – axis it x value becomes 0 → y = 5(0) + 12 → y = 12

So, the line crosses the y – axis 12 units above the origin, so this option states correctly.

c) The graph contains the point (5, 12)

To contain (5, 12) in that line → 12 - 5(5) + 12 = 0 but -1 ≠ 0

So, this option is incorrect.

Hence, option c incorrectly describes about the graph.

7 0

3 years ago

Can someone help me understand what they mean by “interpretation”

zhuklara [117]

Answer:

is the act of explaining, reframing, or otherwise showing your own understanding of something.

Step-by-step explanation:

4 0

3 years ago

What is the product 7/3×5/12

GenaCL600 [577]

7/3 × 5/12 = 35/36

....................................

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3 years ago

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Two birds sit at the top of two different trees that are both 29.7 feet tall. The distance between the first bird and a bird wat

vazorg [7]

If the first bird is on top of the bird watcher and the height of the tree is the same, then we form a right triangle with right angle on the second bird.
We can solve the angle of depression by trigonometric functions. So,sin θ = 29.7 / 42.1θ = sin-1 (29.7/42.1)θ = 44.87°
Therefore, the angle of depression of the second bird and the bird watcher is 44.87°.

7 0

4 years ago