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ladessa [460]
2 years ago
9

22. A question bank has questions of Physics and

Mathematics
1 answer:
trasher [3.6K]2 years ago
7 0

Step-by-step explanation:

Let the number of books of Physics be x . Then , No. of chemistry books =3.5x

Now , according to question :

x+3.5x=90

Or , 4.5x=90

Or , x=90/4.5

Or , x=20

Now ,

3.5x= 3.5×20

= 70

Therefore , there were 70 chemistry books and 20 physics books in that question bank.

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The 3rd one

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Which of the following is a solution for the inequality 2x < 9?
Firdavs [7]
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3 years ago
A T-shirt department store cost 7.50.the total cost in dollar of a T-shirt is givien by the function C(a)=7.5a
tigry1 [53]

Given cost function C(a) = 7.5a, where a is the number of T-shirts.

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We need to plug a=1,2,3,4 in above function to get the costs to complete the table.

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a represents the number of T-shirts.

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3 years ago
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DiKsa [7]

Answer:

k=45

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34kurt

Answer:

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The range is the difference between the highest value and the lowest value. Here the highest value is 55 and the lowest 17. Therefore, the range is take away 17 from 55 which equals to 38

8 0
3 years ago
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