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3 years ago

The area of the United States is 3,794 100 square miles. Which is the best estimation of this area?

Mathematics

1 answer:

FromTheMoon [43]3 years ago

5 0

Answer:

Step-by-step explanation:

if i’m not wrong the answer will be 3 x 16^6

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Will path 1 intercept the crocidile river

Nataly_w [17]

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3 years ago

If you can guess what year, month and day i will give you briliantst

Svetllana [295]

I think you have 14 or 15 years.

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3 years ago

Suppose a and b are both non zero real numbers. Find real numbers c and d such that 1/a+ib= c+id

Thepotemich [5.8K]

$\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}$

Explanation

$\frac{1}{a+bi}=c+di$

Step 1

multiplicate by the conjugate

$\begin{gathered} \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(bi)^2} \\ \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(-b^2)}=\frac{a-bi}{a^2+b^2} \end{gathered}$

notice that

$\begin{gathered} \frac{1}{a+bi}=\frac{a-bi}{a^2+b^2}=\frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i \\ \frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i=c+di \\ so \\ \end{gathered}$ $\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}$

I hope this helsp you

6 0

1 year ago

The perimeter of a rectangular field is 358 yards. If the length of the field is 95 yards, what is it’s width?

Andrej [43]

Answer:

84 yards (don't forget to label, as my friend failed a test because of it!)

Hope this helps

Step-by-step explanation:

The total perimeter of the field is 358

The are length and widths...

the length is 95

but since there are two lengths...

its 95*2 which is 190

358-190=168

Since there are two widths...

168/2= 84

7 0

3 years ago

Read 2 more answers

I am having trouble<br> 2(10-13x)=-34x+60

Elis [28]

<span>x = 5 i beliavie :)..............................</span>

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3 years ago