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Elena-2011 [213]
3 years ago
11

Andre received and spent money in the following ways last month. For each example, write a positive or negative number to repres

ent the change in money from his perspective.
His uncle gave him $25 as a present.
He earned $18 dollars tutoring.
He spent $10 on a book.
Mathematics
1 answer:
lara [203]3 years ago
3 0

Answer:

+25;+18;-10

Step-by-step explanation:

Ok so let's break down the scenario step by step:

  • His uncle gave him $25 so that means it's positive so <em>+</em><em>25</em><em> </em>
  • Now he earned $18 so that means it is also positive so <em>+</em><em>18</em>
  • And now he spent $10 which means it is negative so <em>-</em><em> </em><em>10</em>

(And of you want to find out the amount left with him,

(25+18)-10

=43-10

=$33)

Hope this helps :)

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schepotkina [342]
The total volume I suppose is what you are asking.
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KatRina [158]

Answer:

Option C: 11.7%

Step-by-step explanation:

The number of elements in sample space when a coin is flipped 10 times will be:

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Let A be the event that the tails appear 7 times:

Then,

C_{(n,k)}=\frac{n!}{(k!)(n-k)!} \\where\\n=population\\k=picks\\In our case, k =7\\and\\n=10\\C_{(10,7)}= \frac{10!}{(7!)(10-3)!}\\= 120\\So, \\P(A) = \frac{n(A)}{n(S)} \\P(A) = \frac{120}{1024} \\= 0.1171\\

Converting into percentage:

P(A) = 0.1171*100=11.7%

So, option C is correct ..

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Step-by-step explanation:

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