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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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The cafeteria at a summer camp gives each camper 2/3 cup of juice for breakfast. This morning, 50 campers had juice for breakfas
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The radius of the base of a right circular cone is 7 times greater than the radius of another right circular cone. If the height
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Answer: option D is the correct answer.

Step-by-step explanation:

Let the height of both cones be h

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The formula for determining the volume of a cone is expressed as

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4 years ago
A fish market bought two swordfish at a rate of $12 per pound. The cost of the larger fish was 3 times as great as the cost of t
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7x + 2y = 7<br> -14x + 2y = -11<br> Solve by substitution
kvasek [131]

Answer:

x = 6/7, y = 1/2

Step-by-step explanation:

7x + 2y = 7

-14x + 2y = -11

1) 7x + 2y = 7

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2) -14x + 2y = -11

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3) 2y = 7 - 7x = 7 - 7*(6/7) = 7 - 6 = 1

2y = 1

y = 1/2

7 0
3 years ago
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