Answer:
1 5/7
Step-by-step explanation:
Answer:
2.9=10
Step-by-step explanation:
10-3.10-4=10
Simplify
2.9=10
There are 19 people total, and groups of four are being asked of us. We can use the formula for permutations or combinations.
Permutations:
![\frac{n!}{(n-r)!}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bn%21%7D%7B%28n-r%29%21%7D%20)
Combinations:
![\frac{n!}{r!(n-r)!}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bn%21%7D%7Br%21%28n-r%29%21%7D%20)
Where in both scenarios, there are <em>n</em> objects being chosen at <em>r</em> times.
19 P 4 is 93024
19 C 4 is 3876
It all depends on whether order matters with group placement; if it does, your answer is
93024, if not, then your answer is
3876.:)
3 yrs ago:
Alice - x
Jane - 3x
Fast forward 2 years... 1 year ago:
Sum of their ages = 62
Equation to solve: x + 3x = 62
4x = 62
----- -----
4 4
x = 15.5
From this, we can deterime that Alice is 15 1/2 years old.
Then, plug in 15.5 for x in 3x to find Jane's age.
15.5 × 3 = 46.5
From this, we can determine that Jane is 46 1/2 years old.
I hope this helps you to understand this problem better.
<span> The coordinates of point P on a coordinate grid are (−5, −6). Point P is reflected across the y-axis to obtain point Q and across the x-axis to obtain point R. What are the coordinates of points Q and R? Q(5, 6) and R(−5, −6) Q(−5, −6) and R(5, 6) Q(−5, 6) and R(5, −6) Q(5, −6) and R(−5, 6). </span><span>
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