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Nastasia [14]
3 years ago
14

Write 2 subtraction equations to show how to find 15-7

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
6 0
So 15-7 is 8

Here are some things I did:

10-2 or 28-20
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suppose 5 men and 7 women are on a crowded elevator. at the next floor, four people get off the elevator. find the probability t
lubasha [3.4K]
The total number of arrangements for all of them to be women is:
C(7, 4) because the order does not matter; we'd still have the same arrangements.

Now, we can simplify this:
C(7, 4) = \frac{7!}{4!(7 - 4)!}
= \frac{5040}{4!3!}
= \frac{5040}{24 \cdot 6}
= \frac{5040}{144} = 35

Now, the total number of arrangements, without restriction, is simply: C(12, 4) because we don't care who we pick.

\text{P(4 women): } \frac{35}{495} = \frac{7}{99}
3 0
3 years ago
Factor each. <br><br> 5x to the 3rd ppwer + 25x to the 2nd power -4x -20 = 0
lesya692 [45]
If you are looking forward to adding them together you will get 145.  Just need to know if this questions had options?
4 0
3 years ago
Help me w this please guysssssss
Sphinxa [80]
I think
the answer is 12.56
7 0
3 years ago
Primo car rental agency charges $50 per day plus $0.30 per mile. Ultimo car rental agency charges $20 per day plus $0.70 per mil
olasank [31]

Answer:

cdcdc

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
&lt;strong&gt;Racionaliza las siguientes expresiones:&lt;/strong&gt;&lt;br /&gt;a) 1-√3/5√2&lt;br /&gt;b) 3-√3/3+√3
Nostrana [21]
a) \frac{1- \sqrt{3} }{5 \sqrt{2} } = \frac{\sqrt{2}- \sqrt{6}  }{10} \\\\&#10;b) \frac{3- \sqrt{3} }{3+\sqrt{3}} = \frac{3\sqrt{3}-3}{6} = \frac{3(\sqrt{3}-1)}{6} =\frac{\sqrt{3}-1}{2}.
7 0
3 years ago
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