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devlian [24]
3 years ago
5

music city charges a monthly membership of $25 with each download costing $0.50. Tune Dune does not have a membership fee, but c

harges 1.50 per download. when is it better to beling to mysic cuty? to tune dune? write equations for each and use a graph to find your anwser

Mathematics
1 answer:
Maslowich3 years ago
6 0
Graph. red• 25+0.5d (music city)
blue•. 1.5d

Music city
C=25+0.5d
C-cost
D-downloads

Both are the same cost at 25 downloads
c = 25 + 0.5d \\ c = 25 + 0.5(25) \\ c = 25 + 12.5 \\ c = 37.5
Tune Dune
C=1.5d
c = 1.5d \\ c = 1.5(25) \\ c = 37.5
Tune Dune is cheaper until the 25 song downloaded, the they are equal. After that, Music city is cheaper.

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Kitty [74]

Answer:

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Step-by-step explanation:

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                                                    = 2 x 3.14 x 3m  

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4 0
3 years ago
After a rotation of 90° about the origin, the coordinates of the vertices of the image of a triangle are A'(6, 3), B'(-2, 1),
Rasek [7]

Answer:

<em>A</em>(-3, 6), <em>B</em>(-1, -2), <em>C</em>(-7, 1)

Step-by-step explanation:

To the pre-image after a 270°-counterclockwise rotation [90°-clockwise rotation], just reverse it by doing a 270°-clockwise rotation [90°-counterclockwise rotation]:

Extended Rotation Rules

  • 270°-clockwise rotation [90°-counterclockwise rotation] >> (x, y) → (-y, x)
  • 270°-counterclockwise rotation [90°-clockwise rotation] >> (x, y) → (y, -x)
  • 180°-rotation >> (x, y) → (-x, -y)

So, perform your rotation:

270°-clockwise rotation [90°-counterclockwise rotation] → <em>C</em><em>'</em>[1, 7] was originally at <em>C</em>[-7, 1]

→ <em>B'</em>[-2, 1] was originally at <em>B</em>[-1, -2]

→ <em>A</em><em>'</em>[6, 3] was originally at <em>A</em>[-3, 6]

I am joyous to assist you anytime.

3 0
3 years ago
Read 2 more answers
The price of a certain painting increased by 20% during the first year and decreased by 15% during the second year. The price of
Rina8888 [55]

Answer:

A.102%

Step-by-step explanation:

Let cost price of painting=$100

In first year price increased 20%

Then , the price=100+100(0.20)=$120

In second year

Price decreased 15%

Then , the price of painting=120-120(0.15)

The price of painting=$102

Percent =\frac{final\;price}{Initial\;price}\times 100

By using this formula

Then, we get

Percent of the original price=\frac{102}{100}\times 100

Percent of the original price=102%

Option A is true.

8 0
3 years ago
Help me solve this please!!!!<br> a^4+ 9a^2+81
maksim [4K]

Answer:

(a2+3a+9)(a2-3a+9)

Step-by-step explanation:

5 0
4 years ago
Does anyone know how to do this
Paraphin [41]

Answer: 7(x+2)(x+3)

Step-by-step explanation:

First, you want to find the GCF, 7 goes into all the terms evenly

so 7x^2 + 35x + 42 = 7(x^2 + 5 + 6)

to factor (x^2+5+6), you want to find two numbers whose product is 6 and whose sum is 5 (2 and 3)

so (x^2 + 5 + 6) becomes (x+2)(x+3)

and 7(x^2 + 5 + 6) becomes 7(x+2)(x+3)

5 0
3 years ago
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