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Liono4ka [1.6K]
3 years ago
5

Factor the expression below.

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0

You must remember that a polynomial is written like so...

ax^2 + bx + c

In this case...

a = 1

b = -18

c = 81

To factor you must find two numbers who both add up to b (-18) AND multiply to c (81)

-9 + -9 = -18

-9 * -9 = 81

so...

D. (x - 9)(x - 9)

Hope this helped!

~Just a girl in love with Shawn Mendes

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ms. keeling has eighty trick or treaters visit her house. twenty-five percent are vampires. fifteen percent are pirates. twenty
Gemiola [76]

Answer:

add then divide

Step-by-step explanation:

6 0
3 years ago
In a paint factory, an old conveyer line has filled 20 barrels of paint, and is filling more at a rate of 7 barrels per minute.
vagabundo [1.1K]

It takes 10 minutes for the two lines to have filled an equal number of barrels

Each line will have filled 90 barrels

<em><u>Solution:</u></em>

Let "x" be the number of minutes

<em><u>The old conveyer line has filled 20 barrels of paint, and is filling more at a rate of 7 barrels per minute</u></em>

Thus, a equation is framed as follows:

Old conveyor: 20 + 7(number of minutes)

Old conveyor: 20 + 7x ------- eqn 1

<em><u>A worker just switched on a newer line that can fill 9 barrels per minute</u></em>

Thus, a equation is framed as follows:

New conveyor: 9(number of minutes)

New conveyor: 9x -------- eqn 2

<em><u>In a little while, the two lines will have filled an equal number of barrels.</u></em>

<em><u>Thus, eqn 1 must be equal to eqn 2</u></em>

20 + 7x =9x\\\\9x - 7x = 20\\\\2x = 20\\\\x = 10

Thus it takes 10 minutes for the two lines to have filled an equal number of barrels

<em><u>How many barrels will each line have filled? </u></em>

Substitute x = 10 in any one of equations

Substitute in eqn 2

9x = 9(10) = 90

Thus each line will have filled 90 barrels

8 0
3 years ago
Find the missing angle. 9 5 x°​
iragen [17]

Answer:

45 degrees

Step-by-step explanation:

the right angle is 90 degrees and one angle is 45 degrees and 90+45=135 and 180-135=45 so 45 degrees is the missing angle

5 0
3 years ago
A firm has net working capital of $2,300 and current assets of $3,500. what is the current ratio?
Ulleksa [173]

Based on the net working capital and the current assets, the current ratio of the firm is 2.92

<h3>What is the firm's current ratio?</h3>

First, find the current liabilities:

= Current assets - Net working capital

= 3,500 - 2,300

= $1,200

The current ratio is:

= Current assets / Current liabilties

= 3,500 / 1,200

= 2.92

Find out more on the current ratio at brainly.com/question/2686492

#SPJ4

8 0
2 years ago
Help please it would help my grade alot
Alexxandr [17]

Answer:

It cooled 58.4 degrees

Step-by-step explanation:

T(t) = 68 + 144e ^(-.052t)

We want to find the value when t= 10

T(10) = 68 + 144e ^(-.052*10)

        = 68 +85.611

 T(10)         =153.611

We also need to know

T(0)= 68 + 144e ^(-.052*0)

       =68+144

        =212

We want to know how much it cools

That would be the temperature at  time 0 minus the temperature at  time 10


T(0) - T (10)

212-153.611

58.389

To the nearest tenth

58.4 degrees

3 0
2 years ago
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