2 years ago

An iPhone that is marked $500 is marked up 250%.

Mathematics

1 answer:

belka [17]2 years ago

8 0

Answer:

Step-by-step explanation:

This would be 500 x 250/100 = 125000/100 = 1250

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Order these numbers from least to greatest.

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Answer:

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3 years ago

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Pavlova-9 [17]

Answer:

y=-1/5 x+c

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0=-1+c

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Step-by-step explanation:

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Manu had 16 pears in a basket. Sten gave him 10 more. Manu gave 8 pears to Klara. How many pears does Manu have left?

grin007 [14]

Answer:

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3 years ago

Rewrite 2tan3x in terms of tanx

blsea [12.9K]

$2\tan3x=2\tan(2x+x)=\dfrac{2\tan2x+2\tan x}{1-\tan2x\tan x}$

Use the same identity to expand $\tan2x$ .

$\tan2x=\tan(x+x)=\dfrac{\tan x+\tan x}{1-\tan x\tan x}=\dfrac{2\tan x}{1-\tan^2x}$

$\implies2\tan3x=\dfrac{2\dfrac{2\tan x}{1-\tan^2x}+2\tan x}{1-\dfrac{2\tan x}{1-\tan^2x}\tan x}$
$2\tan3x=\dfrac{2\tan x\left(\dfrac2{1-\tan^2x}+1\right)}{1-\dfrac{2\tan^2x}{1-\tan^2x}}$
$2\tan3x=\dfrac{2\tan x\left(2+1-\tan^2x\right)}{1-\tan^2x-2\tan^2x}$
$2\tan3x=\dfrac{2\tan x(3-\tan^2x)}{1-3\tan^2x}$

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3 years ago