3 years ago

Help on number 12 please?

Mathematics

1 answer:

zloy xaker [14]3 years ago

7 0

Answer:

f(n)= 5 · 4

$f(n) = 5 \times 4 ^{n - 1}$

Step-by-step explanation:

You use the explicit formula for geometric sequence. The five is the firat term and is placed correctly. The 4 is the rate of change, because if you multiply 5 by 4 you get 20 and so on.

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Viktor [21]

Answer:

$x=2\sqrt{5}$

Step-by-step explanation:

If that is a square, then all sides are the same. Therefore, it's a $\sqrt{10}$ by $\sqrt{10}$ shape. We'll use Pythagorean Theorem to find the diagonal.

$a^2+b^2=c^2\\\sqrt{10}^2+ \sqrt{10}^2=x^2\\10+10=x^2\\20=x^2\\\sqrt{20}=x\\\sqrt{4*5}=x\\ 2\sqrt{5}=x$

Since it's not a fraction, there is no denominator to rationalize. Let me know if you have any other questions!

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3 years ago

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3 years ago

Read 2 more answers

In a cookie mix, we find spice cookies, snickerdoodle cookies, and no-bake cookies in a ratio of 3:3:5. If a bag of the mix cont

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Answer:

see the explaination

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let x be 3:3:5

3x:3x:5x

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2 years ago

Help on number 12 please?​

Help on number 12 please?