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Alex
3 years ago
11

Simply the expression-2.3(4r+5)-3.6r

Mathematics
2 answers:
marysya [2.9K]3 years ago
7 0
-12.8r - 11.5 that’s the answer to your question
laiz [17]3 years ago
3 0

Answer:

Step-by-step explanation:

you need to cancel out the brackets by multiplying -2.3 with every thing inside the brackets

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Listed below:

Step-by-step explanation:

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3 years ago
Read 2 more answers
Ron finds 9 books at a bookstore that he would like to buy, but he can afford only 5 of them. In how many ways can he make his s
pashok25 [27]

Answer:

15,120 for the first question. 1,680 if one of the books is a must

Step-by-step explanation:

When Ron chooses his first book, he has 9 options. After that, when he chooses his second book, he only has 8 choices because he already picked one of them. By his third choice, he only has 7 choices and so on.

We can make an equation to represent this,

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Multiplying all of that out gets you 15,120.

The second problem is even easier. Since one of the books is already chosen for him, he starts off only having 8 options. Since he is only choosing four books this time, we are only multiplying four numbers.

8 x 7 x 6 x 5

Multiplying all of that out tells you there are 1,680 ways he can make his selection in the second scenario.

5 0
3 years ago
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