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2 years ago

(X+2y)(x-2y) how do I solve this

Mathematics

1 answer:

Fudgin [204]2 years ago

5 0

Step-by-step explanation:

(x+2y)(x-2y)

x^2-2xy+2xy-(2y)^2
x^2-4y^2

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Square root of 32 x square root of 1 over 18

lisov135 [29]

<h3>Solution:</h3>

$\sqrt{32} \times \sqrt{ \frac{1}{18} } \\ = \sqrt{32} \times \frac{ \sqrt{1} }{ \sqrt{18} } \\ = \sqrt{32} \times \frac{1}{ \sqrt{18} } \\ = \frac{\sqrt{2 \times 2 \times 2 \times 2 \times 2}}{ \sqrt{2 \times 3 \times 3} } \\ = \frac{ \sqrt{ {2}^{2} \times {2}^{2} \times 2} }{ \sqrt{2 \times {3}^{2} } } \\ = \frac{2 \times 2 \times \sqrt{2} }{3 \times \sqrt{2} } \\ = \frac{4 \times \sqrt{2} }{3 \times \sqrt{2} } \\ = \frac{4}{3}$

<h3>Answer:</h3>

$\frac{4}{3}$

<h3>Hope it helps...</h3>

ray4918 here to help

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2 years ago

Please a genius help me please

Vedmedyk [2.9K]

Answer:

B, D, and F

They match the graph

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1 year ago

You deposit $200 in an account earning 3.5% simple interest how long will it take for the balance of the account to be $221

Rus_ich [418]

It takes 3 years for the balance of account to be $ 221

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

From given information,

Principal = $ 200

Rate of interest = 3.5 %

Amount after "n" years = $ 221

To find: number of years

In simple Interest,

Simple interest = amount earned - principal

Simple interest = 221 - 200 = 21

Thus simple interest earned is $ 21

<em><u>The formula for simple interest is given as:</u></em>

$simple\ interest = \frac{ p \times n \times r}{100}$

Where,

p is the principal

n is the number of years

r is the rate of interest per annum

Substituting the given values in formula,

$21 = \frac{200 \times n \times 3.5}{100}\\\\21 = 2n \times 3.5\\\\n = \frac{21}{7}\\\\n = 3$

Thus it takes 3 years for the balance of account to be $ 221

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2 years ago

A is a quadrilateral with two sets of parallel sides and 4 right<br> angles

Bas_tet [7]

Answer:

If you are asking for the type of quadrilateral, then it could be a rectangle or a square.

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2 years ago

Which inequality models this problem?

IgorC [24]

The correct answer would be

D) 25s>2500+4.5s

Hope this helps and have a great day!

because $2500 spent + $4.50 supplies on each T shirt

so selling each shirt $25, if you want to make profit...total selling t shirt has to be greater than the total spent

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2 years ago