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galina1969 [7]
3 years ago
14

- Multiply. (9w-2u)(9w+2u)Simplify your answers.​

Mathematics
2 answers:
const2013 [10]3 years ago
8 0

Answer:

81w² - 4u²

Step-by-step explanation:

To multiply two binomials together, we would normally use the FOIL method.

First

Outer

Inner

Last

But if we look carefully, we can see that there is a much easier way to multiply the two binomials. Remember:

(a + b)(a - b) = a² - b²

(9w - 2u)(9w + 2u) = (9w)² - (2u)² = 81w² - 4u²

I hope you find my answer and explanation to be helpful. Happy studying.

Andrei [34K]3 years ago
7 0

Answer:  81w^2 - 4u^2

Step-by-step explanation:

(9w - 2u)(9w + 2u)  Apply the distributive property twice than combine them.

9w( 9w + 2u)  =  81w^2 + 18wu

-2u(9w + 2u) = -18wu - 4u^2  

81w^2 + 18wu - 18wu - 4u^2    Combine like terms

81w^2 - 4u^2

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kati45 [8]

The equation represents a population of 370 animals that decreases at an annual rate of 11% is p=370(0.89)^{t}.

<h3>What is an exponential function?</h3>

It is defined as the function that rapidly decreases and the value of the exponential function is always positive. It denotes with exponent y = a^x

where a is a constant and a>1.

Given that,

A population of 370 animals that decreases at an annual rate of 11%

a = 370, r = 11%

p = a(1-r)^{t}

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p  =  370(0.89)^{t}

Hence, The equation represents a population of 370 animals that decreases at an annual rate of 11% is p=370(0.89)^{t}.

To learn more about exponential function from the given link:

brainly.com/question/24429075

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Juli2301 [7.4K]

Step-by-step explanation:

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horsena [70]

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Step-by-step explanation:

sin32=0.530

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4 years ago
A snail is traveling at a rate of 1.5 feet per minute. Write the rate in feet per second. Write the rate in feet per hour
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3 0
3 years ago
Solve t/12=4.<br><br> The solution is t=
lyudmila [28]
T=48

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