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JulijaS [17]
4 years ago
5

Symiah went to the bookstore and bought a hardcover book which was marked 10 percent off. If she saved $5 on the book, what was

the original price of the book??? PLZZ I will give yuo 100 pointd
Mathematics
1 answer:
Crank4 years ago
5 0

Is it obvious the 10% of the book's price is the $5 right?

So the book's price is $50.

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5a – 10b = 45, when b = 3
balandron [24]


Well, since you have the value of b, the first thing you want to do is substitute that value in for b.

5a - 10(3) = 45

10*3 = 30

5a - 30 = 45

Now, to get the variable by itself (a) you have to + 30 because you have to reverse the subtraction.

5a = 75

Now, you divide by 5 to finish getting a by itself.

a = 15

Hope this helps!

6 0
3 years ago
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A clothes shop has some special offers. T-shirts are buy one get one free and jumpers are 3 for 2. The normal price of a T-shirt
zavuch27 [327]

Answer:

£53.40

Step-by-step explanation:

The shop has an offer where you:

buy 1 T-shirt and get 1 free

buy 3 jumpers and get 2 free

This means if a person pays for 1 T-shirt, he/she gets two and if he/she pays for 3 jumpers, he/she gets 5.

Therefore, to buy 4 T-shirt, you have to pay for 2 and to buy 5 jumpers, you have to pay for 3.

1 T- shirt costs £4.80, therefore, 2 will cost:

2 * 4.80 = £9.60

1 jumper costs  £14.60, therefore, 3 will cost:

3 * 14.60 = £43.80

Therefore, the customer will sped a total of:

43.80 + 9.60 = £53.40

The customer will pay £53.40 to get 5 jumpers and 4 T-shirts using this offer.

7 0
3 years ago
Jori has 7 boxes of books, with each box holding the same number of books. he has 126 books in all. how many books are there per
Andreyy89
There would be 18 books per box. 

126/7 = 18

Hope this helps!
5 0
3 years ago
Read 2 more answers
I need it fast plz help me
Ludmilka [50]
Just did the work in class. It is greater than.
4 0
4 years ago
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Which set of numbers could represent the lengths of the sides of a right triangle?
vitfil [10]

in this problem what you are really looking for is which of these sets is a pathagorean triple. That means it will solve the pathagorean theorem. (a sqaured + b squared = c squared) c is always going to be the largest number or the hypotenuse. if you plug all the number sets into the theorem, only one works and that is 7, 24, 25 which is your answer.

4 0
3 years ago
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