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Black_prince [1.1K]
3 years ago
5

I really need help...Will mark brainiest

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
3 0

Answer:

x² + 18x +81

x² - 14x +49

4x²- 4x - 1

Step-by-step explanation:

multiply the x in the first parentheses by x and 9 in the other parentheses and

multiply the 9 in the first parentheses by x and 9 in the other parentheses and add all together

(x+9)(x+9)

x² + 9x + 9x + 81

x² + 18x +81

multiply the x in the first parentheses by x and -7 in the other parentheses and multiply the -7 in the first parentheses by x and -7 in the other parentheses and add all together

(x-7)(x-7)

x² -7x - 7x +49

x² - 14x +49

(2x-1)² is the same as (2x-1)(2x-1)

multiply the 2x in the first parentheses by 2x and -1 in the other parentheses and multiply the -1 in the first parentheses by 2x and -1 in the other parentheses and add all together

(2x-1)(2x-1)

4x²-2x-2x+1

4x²- 4x - 1

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An apartment complex has a total of 175 units. Of these, 154 units are occupied. What percent of the apartment are unoccupied?
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Maria and Lamar are playing a game. Maria noticed that the digits of her
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3 years ago
The length of the hypotenuse of a 30°–60°–90° triangle is 9. Find the perimeter.
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In a 30 60 90 triangle, the short side = one half the hypotenuse = 4.5
The middle side = short side * sq root of 3
So, the middle side = 4.5 * sq root of 3 ( <span> <span> <span> 7.7942</span></span></span>)
Perimeter = 4.5 + 7.7942 + 9
Perimeter = <span> <span> <span> 21.2942 </span> </span> </span>

Source:
http://www.1728.org/trig2.htm


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3 years ago
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You have a 12 inch by 14 inch picture that you frame. When you hung the picture, you found that the entire area is 261.44 in. Wh
erastova [34]

Answer:  c) 3.2 inches

<u>Step-by-step explanation:</u>

Let x represent the width of the frame

Then the area of the frame is:

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Rewrite it in Standard form of a quadratic equation:

x² + 26x + 168 = 261.44

x² + 26x - 93.44 = 0

Use Quadratic Formula to solve for x:

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