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Alja [10]
3 years ago
6

Expand the polynomial (x^(2)+xy-y^(2))(x+y)

Mathematics
1 answer:
xxTIMURxx [149]3 years ago
6 0

Answer:

It's already expanded.

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Andrea made a replica of the Empire State Building. The surface area of the model is 45 ft2. What is the surface area of the act
melamori03 [73]

Answer:

<u>87,120 ft²</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Surface area of the Empire State building replica = 45 square feet

Scale factor = 44

2. What is the surface area of the actual Empire State Building in square feet?

For answering the question, we will make the following calculations:

45 square feet = 9 feet * 5 feet or,

45 square feet = 10 feet * 4.5 feet, or,

45 square feet = 20 feet * 2.25 feet.

Now, let's apply the scale factor to all of these probable lengths of the sides of the surface area of the replica, as follows:

(9 *44) * (5 * 44) = 396 * 220 = 87,120 ft²

(10 * 44) * (4.5 * 44) = 440 * 198 = 87,120 ft²

(20 * 44) * (2.25 * 44) =  880 * 99 = 87,120 ft²

<u>As we proved, no matter what are the lengths of the sides of the surface area of the replica. after applying the scale factor, the result is the same: 87,120 ft²</u>

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How to define trigonometric ratios
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They are ratios of two sides of a right triangle and a related angle. Trigonometric functions are typically used to calculate unknown lengths or angles in a right triangle.
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Emma has $89 in her bank account. she uses 30% of her money to pay a bill. How much did she spend?
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The answer is c 10% of 89 is 8.9 so multiply by 3 you get 26.70

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25pts for correct answer with explanation Find the value of x when 2(x - 3) + 1 = 3x + 4
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The answer is A) -1.
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How many moles of water are produced when 3.0 moles of hydrogen gas reacts with
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