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kirill [66]
2 years ago
9

Please look at the attachment. 30 points.

Mathematics
1 answer:
Zigmanuir [339]2 years ago
4 0

answer:

that the answer

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I'm confused. Can someone help?
VARVARA [1.3K]

a.

The polynomial w^2+18w+84 cannot be factored

The perfect square trinomial is w^2+18w + 81

----------

The reason the original can't be factored is that solving w^2+18w+84=0 leads to no real solutions. Use the quadratic formula to see this. The graph of y = x^2+18x+84 shows there are no x intercepts. A solution and an x intercept are basically the same. The x intercept visually represents the solution.

w^2+18w+81 factors to (w+9)^2 which is the same as (w+9)(w+9). We can note that w^2+18w+81 is in the form a^2+2ab+b^2 with a = w and b = 9

================================================

b.

The polynomial y^2-10y+23 cannot be factored

The perfect square trinomial is y^2-10y + 25

---------

Using the quadratic formula, y^2-10y+23 = 0 has no rational solutions. The two irrational solutions mean that we can't factor over the rationals. Put another way, there are no two whole numbers such that they multiply to 23 and add to -10 at the same time.

If we want to complete the square for y^2-10y, we take half of the -10 to get -5, then square this to get 25. Therefore, y^2-10y+25 is a perfect square and it factors to (y-5)^2 or (y-5)(y-5)

8 0
3 years ago
. Write 12 as a percent.​
Burka [1]

Answer:

1200%

Step-by-step explanation:

12 = 12.

To convert to percent, bring decimal back 2 places

It becomes 1200%

7 0
3 years ago
Read 2 more answers
What is the circumference of a circle with radius 2.1 cm? Use > (inserts wavey = sign) 3.14.
Fiesta28 [93]

Step-by-step explanation:

The formula for the circumference of a circle is 2*pi*radius

Circumference = 2(3.14)(2.1)

= 13.188cm

8 0
3 years ago
Simplify each expression by distributing and combined bf like terms (SHOW WORK) please
GarryVolchara [31]

Answer:

c - 39

Step-by-step explanation:

<em>Given</em><em>,</em>

<em>-</em><em>4</em><em> </em><em>(</em><em>8</em><em> </em><em>-</em><em> </em><em>c</em><em> </em><em>)</em><em> </em><em>-</em><em> </em><em>(</em><em>3</em><em>c</em><em> </em><em>+</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>-</em><em>4</em><em> </em><em>(</em><em> </em><em>-c </em><em>+</em><em> </em><em>8</em><em> </em><em>)</em><em> </em><em>-</em><em> </em><em>(</em><em>3</em><em>c</em><em> </em><em>+</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>4</em><em>c</em><em> </em><em>-</em><em> </em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>(</em><em> </em><em>3</em><em>c</em><em> </em><em>+</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>4</em><em>c</em><em> </em><em>-</em><em> </em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>3</em><em>c</em><em> </em><em>-</em><em> </em><em>7</em>

<em>=</em><em> </em><em>(</em><em> </em><em>4</em><em> </em><em>-</em><em> </em><em>3</em><em> </em><em>)</em><em>c </em><em>+</em><em> </em><em>(</em><em> </em><em>-</em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>7</em><em> </em><em>)</em>

<em>=</em><em> </em><em>c </em><em>+</em><em> </em><em>(</em><em> </em><em>-</em><em>3</em><em>2</em><em> </em><em>-</em><em> </em><em>7</em><em>)</em>

<em>=</em><em> </em><em><u>C </u></em><em><u>-</u></em><em><u> </u></em><em><u>3</u></em><em><u>9</u></em>

<em><u>hope </u></em><em><u>this </u></em><em><u>answer </u></em><em><u>helps </u></em><em><u>you </u></em><em><u>dear!</u></em><em><u> </u></em><em><u>take </u></em><em><u>care!</u></em>

8 0
3 years ago
Which is the slope-intercept form of the equation for the line that passes through the
miskamm [114]

Answer:

y=4x-3

Step-by-step explanation:

Find the slope for your equation by calculating the change in y over change in x ∆y/∆x or (y2-y1)/(x2-x1)

13-5=8

4-2=2

8/2=4

We now need to use one of these coordinates to finish the equation y=4x+b

5=4(2)+b

5=8+b

b=-3

Now we rewrite our equation in slope int form as y=4x-3

You can check your work by using the other coordinate (4, 13) and see the equation balances.

4 0
4 years ago
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