2 years ago

. The formula to find the surface area of a sphere is to take the radius of the sphere and square

Mathematics

1 answer:

fredd [130]2 years ago

5 0

Wait. Let me catch up first.

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How do I solve this problem using the substitution method?

Ira Lisetskai [31]

<span>(y=mx+b) or (ax+by=c) hope this helped

</span>

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2 years ago

Please help me 10 points will give crown

Lubov Fominskaja [6]

A,d,b, and then c ,basically least to greatest

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How to find the square root of complex numbers?? Find the square root of (6+8i) ??

ivann1987 [24]

Answer:

$2 \sqrt{2} + i \sqrt{2}$

Step-by-step explanation:

The square of a complex number is a complex number. Here, we have:

${(a + bi)}^{2} = 6 + 8i$

${a}^{2} + 2abi - {b}^{2} = 6 + 8i$

We then have this system of equations:

${a}^{2} - {b}^{2} = 6$

$2ab = 8$

Solving this system:

$ab = 4$

$b = \frac{4}{a}$

${a}^{2} - {( \frac{4}{a}) }^{2} = 6$

${a}^{2} - \frac{16}{ {a}^{2} } = 6$

${a}^{4} - 16 = 6{a}^{2}$

${a}^{4} - 6 {a}^{2} - 16 = 0$

$( {a}^{2} - 8)( {a}^{2} + 2) = 0$

${a}^{2} = 8$

$a = 2 \sqrt{2}$

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1 year ago

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Answer the question in the picture.

nlexa [21]

Answer:

The answer is C

Step-by-step explanation:

Reflecting across the y-axis is like folding across the y-axis.

2,-2, turns into -2,-2

Hope this helped!

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2 years ago

Marriane can say hello in more than 7 languages. Which number line could represent this situation?

Alina [70]

Answer:

A) x > 7

Step-by-step explanation:

Since it's more than, the inequality would be >

Since it's >, that means it's an open circle

So,

x > 7

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1 year ago