2 years ago

1. A-Tunes requires a membership fee of $12 a month and $1 for each download.

Mathematics

1 answer:

matrenka [14]2 years ago

4 0

<h3>Answer:</h3>

After 16 downloads the charges will equal each other.

<h3>Step-by-step explanation:</h3>

First set up an equation

x = Downloads

12 + 1x = 5 + 1.5x

Solve

12 + 1x = 5 + 1.5x <- Rewrite your equation

-5 -5 <- Subtract 5 from both sides

8 + 1x = 1.5x <- Simplify

-1x -1x <- Subtract 1 from both sides

8 = 0.5x <- Simplify

8 = 1/2x <- Convert 0.5 to a fraction to make the next step easier

16 = x <- Multiply both sides by 2 to divide by

a fraction

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S_A_V [24]

The answer is C.
39-5/ 21-4 = 2

6 0

2 years ago

Convert R=(12)/4+8sin the theta to rectangular form

kompoz [17]

$r=\dfrac{12}{4+8\sin\theta}=\dfrac3{1+2\sin\theta}$

Let $y=2\sin\theta$ , and recall that in polar coordinates, $r=\sqrt{x^2+y^2}$ . This means you have

$\sqrt{x^2+y^2}=\dfrac3{1+y}$

You can stop there, or try to find something that looks somewhat nicer.

$x^2+y^2=\dfrac9{(1+y)^2}$