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Sav [38]
3 years ago
11

How many 3 digit numbers can be formed using the numerals of {3,2,7,9} if repetition is not allowed

Mathematics
1 answer:
Harman [31]3 years ago
8 0
4*3*2*1

24 three-digit numbers can be formed
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The ratio of adults to children at a park is 1/3. The total number of people at the park is 36. How many children are at the par
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What is the median distance jumped 7.48, 7.60, 7.15, 7.44, 7.73, 7.72
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A rectangle has a perimeter of 54 cm. It has a length of 15 cm. What is its area? *
d1i1m1o1n [39]

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2 years ago
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3 years ago
The solution to the system equations
katovenus [111]

Let's solve this system of equations through substitution.

We have these two equations.

-7x-2y=14

6x+6y=18

Now let divide the second equation by 6.

6x+6y=18 ---->   x+y=3

Next, let us move y to the right side of the equation.

x+y=3 -------> x=3-y (x equals 3-y)

Because we found out that what x is in terms of y, we can input that in for every instance of x in this equation below.

-7x-2y=14 becomes -7(3-y)-2y=14 (Why? Because x equals 3-y!)

We have a one variable equation now and can solve for y.

-7(3-y)-2y=14

-21+7y-2y=14

5y=35

y=7

Plug in 7 for y in any equation to find x.

x+y=3

x+7=3

x=-4

answer: x=-4, y=7

3 0
3 years ago
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