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nasty-shy [4]
3 years ago
15

Amy bought a necklace that had an original price of $20. She used a 30% off coupon. The tax rate was 7.5% (added after the disco

unt). How much change will Amy get from a $20 bill?
Mathematics
2 answers:
Leno4ka [110]3 years ago
7 0
I think that it’s 4.95
MatroZZZ [7]3 years ago
5 0
Answer: $4.95

20 • .30 = 6
20 - 6 = 14
14 • .075 = 1.05
14 + 1.05 = 15.05
20 - 15.05 = 4.95
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Alja [10]

Answer:

The area is 243 square feet

Step-by-step explanation:

The perimeter of a rectangle is the sum of all four sides.

Two of the sides represent the length and two represent the width.

Given what we know and using l to represent the length and w to represent the width.

l + l + w + w = 72ft

or more concisely

2l + 2w = 72ft

The four sides all add together to equal 72ft

We also know that

l = 3w

This says the length is equal to 3 times the width

we have two unknowns, l and w, and now we have two related equations so we can solve for l and w.

The first thing we will do is replace l with 3w in the first equation because the second equation tells us that l is the same as 3w. Making the replacement gives us

2(3w) + 2w = 72ft

2 times 3w is 6w

6w + 2w = 72ft

6w plus 2w is 8w

8w = 72ft

Now if we divide both sides by 8 we maintain the equality since we are making the same change to both sides

8w / 8 = 72ft / 8

8w divided by 8 is 1w or just w and 72ft divided by 8 is 9ft

w = 9ft

So now we know the width is 9ft

if we now replace w with 9 in one of our original equations we can solve for l, let's use l = 3w

l = 3(9ft)

3 times 9 is 27 so

l = 27ft

So the length is 27ft which is 3 times the width of 9ft

The area of a rectangle is length times width or l x w, so

area = 27ft x 9ft

area = 243sqft

ft means feet and sqft means square feet

4 0
3 years ago
A taxi cab in myrtle beach charges $2 per mile and $1 for every person. If a taxi cab ride for two people costs $12, how far did
oksian1 [2.3K]

Answer:

5 Miles

Step-by-step explanation:

5 Miles = 1 Miles = $2 X 5 = $10

1 Person = $1

Therefore 2 People = $1 X 2

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3 years ago
Can someone help me with these 3
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24. 244 cm

25. 65 mm

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3 years ago
Help please god help
oksian1 [2.3K]
yikes i remember doing this but.... i completely forgot ;–; i really wish i could help
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2 years ago
Math zoom join ends at 10:30 ID: 854 8913 6878<br> PASSCODE: 8yw2id hurry join be funny
Inessa05 [86]

no thanks but I'll see if I can get friends to join

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3 years ago
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