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Arlecino [84]
3 years ago
13

Eric purchased three music CDs and a sweatshirt from a band's online store and received a 20% discount. He paid $100 for his pur

chase. The following week, the same store offered a 40% discount on all its products. Eric's friend Neil took advantage of the sale and bought four music CDs and two sweatshirts for $120.
1. Assuming that the actual prices of the music CDs and the sweatshirts are unchanged, the price of a music CD is $_____
answers:
20
25
30
50

and the price of a sweatshirt is $_____
answers:
20
25
30
50
Mathematics
2 answers:
emmasim [6.3K]3 years ago
6 0
(3c+s)(100-20)/100=100  multiply both sides by 100

(3c+s)80=10000  divide both sides by 80

3c+s=125  subtract 3c from both sides...

s=125-3c....now let's look at the second situation...

(4c+2s)(100-40)/100=120  multiply both sides by 100

60(4c+2s)=12000  divide both sides by 60

4c+2s=200  divide both sides 2

2c+s=100 subtract 2c from both sides

s=100-2c, and from earlier we saw that s=125-3c, since s=s:

100-2c=125-3c  add 3c to both sides

100+c=125  subtract 100 from both sides

c=25, and since s=100-2c

s=50

So cds cost $25.00 and sweatshirts cost $50.00
ladessa [460]3 years ago
3 0

CDs cost 25 and sweatshirts cost 50

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polet [3.4K]
What percent of 55 is 13

percent means parts out of 100
x%=x/100

'of' means multiply

what percent of 55 is 13 means
x/100 times 55=13
times both sides by 100
55x=1300
divide both sides by 55
x=23.63636363636363
answer is 23.63%
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3 years ago
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Step-by-step explanation:

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using difference of two squares, we have:

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Answer:

Below

Step-by-step explanation:

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Serggg [28]
The answer fam is .... The x-intercept represents Yvonne's account balance at the beginning of the year. This statement is False............The slope represents the amount Yvonne deposits to her account each week. This statement is True.........<span>Yvonne no longer has an overdraft balance 4 weeks after the beginning of the year. This statement is True</span>

3 0
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SpyIntel [72]

Answer:

23

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Step-by-step explanation:

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