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vitfil [10]
3 years ago
8

A store is having a sale on DVDs and CDs. DVDs cost $4 and CDs cost $7. On one day, the store made $204 from DVD and CD sales, a

nd sold a total of 39 items. Write a system of equations, then solve to find how many DVDs and CDs were sold.
Mathematics
1 answer:
Gre4nikov [31]3 years ago
4 0
We are given here the individual costs of DVD and CD as well as the total sales and the number of items sold on one day. To solve the number of DVDs and CDs sold each, we devise two independent linear equations:

(1) x + y = 39
(2) 4x + 7y = 204

x- number of DVDs; y - number of CDs

solving, x= 23 DVDs
y = 16 CDs

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iogann1982 [59]
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8 0
3 years ago
Which of the following is the point and slope of the equation y - 11 = 3(x + 13)?
4vir4ik [10]
The answer is A.

The equation simplifies to y=3x+50.
So, C is already not an option.

Now we just plug in points to see if the point works for the equation.

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Thus, this point falls on the line of this equation and is a point.

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I hope this helps!
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3 years ago
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2 years ago
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