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Mashutka [201]
3 years ago
10

Joana joins a cd club. She pays $7 per month plus $10 for each cd that she orders. Write an equality to find how many cd's she c

an purchase in a month. If she spends no more than $100. Identify what your variable represents.
Mathematics
1 answer:
maksim [4K]3 years ago
6 0
7x+10 \leq 100

x=the number of months

So the "7x" is the $7 per month, and the "10" is the $10 for each CD being ordered. It can't be more than 100, so the "less than or equal to" sign will be used. 


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what is the equation of the line that is perpendicular to the line y=3/5x+10 and passes through the point (15,-5)
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Answer:

y = -\frac53x + 20

Step-by-step explanation:

Hello!

A line that is perpendicular to another has an opposite-reciprocal slope.

Meaning:

  • Flip the sign (+/-)
  • Flip the fraction

The slope perpendicular to 3/5 would be -5/3.

We can solve for the y-intercept by plugging in the x and y values given from the coordinate into the equation with out new slope.

<h3 /><h3>Solve for B</h3>
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  • -5 = -25 + b
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The y-intercept of the new line is 20.

The equation is y = -\frac53x + 20

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