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3 years ago

Slope-Intercept Applications ( = mx +O)

Mathematics

1 answer:

Afina-wow [57]3 years ago

5 0

The cost of downloading the app and downloading 30 songs is $40.7

Step-by-step explanation:

The equation can be written using slope-intercept form

Let x be the number of songs

Then

$1.29 per song will be written as

1.29x

for x number of songs

The initial charges are $2 so the equation will be:

$f(x) = 1.29x+2$

To find the cost of 30 songs, we have to put x= 30

So,

$= 1.29(30)+2\\=38.7+2\\=40.7$

Hence,

The cost of downloading the app and downloading 30 songs is $40.7

Keywords: Functions, slope

Learn more about functions at:

#LearnwithBrainly

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What is 15% of 135, show your work

SIZIF [17.4K]

Answer:

20.25

Step-by-step explanation:

Percentage solution with steps:

Step 1: Our output value is 135.

Step 2: We represent the unknown value with $x$

Step 3: From step 1 above,$135=100\%$

Step 4: Similarly, $x=15.\%$

Step 5: This results in a pair of simple equations:

$135=100\%(1)$.

$x=15.\%(2)$

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

$\frac{135}{x}=\frac{100\%}{15.\%}$

Step 7: Again, the reciprocal of both sides gives

$\frac{x}{135}=\frac{15.}{100}$

$\Rightarrow x=20.25$Therefore, $15.\%$ of $135$ is

sorry if it took to long have a great day and brainliest is appreciated!!!!!

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3 years ago

Can someone help me find out this question :) ? thanks <3 for 8th grade algebra

Assoli18 [71]

Answer:

4,500,000 population in 1950

Step-by-step explanation:

the equation is 4p + 1,000,000 = 19,800,000

3 0

3 years ago

Claire has 5 more pencils then her friend Stan. Claire has 18 pencils. how many does stan have ?

Tcecarenko [31]

Answer:

Stan has 13 pencils.

Step-by-step explanation:

s+5=18

-5 -5

s=13

Hope this helps! ;)

<em>(plz mark me as brainliest?)</em>

8 0

3 years ago

Erika is working on solving the exponential equation 50x = 17; however, she is not quite sure where to start. using complete sen

seropon [69]

The equation be 50x = 17 then the value of x = 17/50.

<h3>How to find the value of x?</h3>

To estimate the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to estimate the result.

Let the equation be 50x = 17

Diving both sides of the equation by 50, we get

50x/50 = 17/50

x = 17/50

Therefore, the value of x = 17/50.

To learn more about the expression refer to:

brainly.com/question/723406

#SPJ4

3 0

2 years ago

It has been said that newspapers are disappearing, replaced by various electronic media. In 2004, newspaper circulation (the num

shutvik [7]

Answer:

A. $y=-1.2x+59$

B. 42.2 million

Step-by-step explanation:

Part A:

Given:

Newspapers circulated in year 2004, $y_{1}=59\textrm{ million}$

Newspapers circulated in year 2014, $y_{2}=47\textrm{ million}$

Let the time $x$ start at the year 2004. So, $x_{1}=0$

For the year 2014, $x_{2}=2014-2004=10$

Therefore, linear relationship between newspapers circulated and time passed since 2004 is given as:

$y-y_{1}=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}(x-x_{1})\\y-59=\frac{47-59}{10-0}(x-0)\\y-59=-\frac{12}{10}x\\y=-1.2x+59$

Therefore, the equation describing the relationship is: $y=-1.2x+59$

Part B:

For the year 2018, $x=2018-2004=14$

Plug in 14 for $x$ in the above equation and solve for $y$ . This gives,

$y=-1.2(14)+59\\y=-16.8+59\\y=42.2$

Therefore, in the year 2018, the newspaper circulation will be 42.2 million.

8 0

3 years ago