Mathematics: What is the maximum of cds costing $7 each that a person can buy with $45? how much change will the person receive

In polar coordinates, we haveFrom this we can writeIf , then , so we get...

What is the maximum of cds costing $7 each that

Ответ:

josierednour285

05.06.2020

Mathematics

Step-by-step explanation:

because it cost he has $45 and each cost $7 so he will get $3 back.

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Ответ:

dejabrewer01

05.06.2020

Mathematics

he can buy 6 CD’s and will receive $3 in change

Step-by-step explanation: he can buy only 6 because 7 times 6 equals 42 and he only has 45 dollars. To figure out the change you do 45 minus 42 and that equals 3.

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Ответ:

camilacarrielh15

08.06.2021

Mathematics

In polar coordinates, we have

$x=r\cos\theta\implies\cos\theta=\dfrac xr$
$y=r\sin\theta\implies\sin\theta=\dfrac yr$

From this we can write

$\tan\theta=\dfrac{\sin\theta}{\cos\theta}=\dfrac{\frac yr}{\frac xr}=\dfrac yx$

If $\theta=\dfrac{4\pi}3$ , then $\tan\theta=\sqrt$ , so we get

$\dfrac yx=\sqrt3\implies y=\sqrt3\,x$

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What is the maximum of cds costing $7 each that a person can buy with $45? how much change will the person receive

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