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3 years ago

Algebra help please!!! (Dividing powers)

Mathematics

1 answer:

Sloan [31]3 years ago

5 0

Hi

$3^{15}\text{ krill in }3^{7}\text{ m}^3$

So $\dfrac{3^{15}}{3^7}=3^{15-7}=3^{8}\text{ krill in 1m}^3$

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Heyy!!

Semmy [17]

Answer:

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Step-by-step explanation:

9/4 in fraction form, so it equal 2 1/4. Hope this helps

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3 years ago

if you flip a coin 10 times, what is the best prediction possible for the number of times it will land on heads?

SVETLANKA909090 [29]

Proabably. 5 because if there is 2 sides on a coin then you should divide 10÷2 which is 5.

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3 years ago

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How to solve 3 and 1/2 + 5 and 1/2

zheka24 [161]

Answer:

Step-by-step explanation:

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3 years ago

Prove that sinxtanx=1/cosx - cosx

maks197457 [2]

Answer:

See below

Step-by-step explanation:

We want to prove that

$\sin(x)\tan(x) = \dfrac{1}{\cos(x)} - \cos(x), \forall x \in\mathbb{R}$

Taking the RHS, note

$\dfrac{1}{\cos(x)} - \cos(x) = \dfrac{1}{\cos(x)} - \dfrac{\cos(x) \cos(x)}{\cos(x)} = \dfrac{1-\cos^2(x)}{\cos(x)}$

Remember that

$\sin^2(x) + \cos^2(x) =1 \implies 1- \cos^2(x) =\sin^2(x)$

Therefore,

$\dfrac{1-\cos^2(x)}{\cos(x)} = \dfrac{\sin^2(x)}{\cos(x)} = \dfrac{\sin(x)\sin(x)}{\cos(x)}$

Once

$\dfrac{\sin(x)}{\cos(x)} = \tan(x)$

Then,

$\dfrac{\sin(x)\sin(x)}{\cos(x)} = \sin(x)\tan(x)$

Hence, it is proved

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3 years ago

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jarptica [38.1K]

Answer:

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Step-by-step explanation:

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3 years ago

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