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Tasya [4]
3 years ago
6

N is a positive integer. Explain why n(n-1) must be an even number.

Mathematics
1 answer:
svetoff [14.1K]3 years ago
4 0
If N is a positive integer, it must be either even or odd. If N is odd, then N-1 will be even. If N is even, then N-1 will be odd. Either way, when you multiply n and n-1, one of those expressions is going to be an even number, and any number multiplied by an even number is an even number. Hope this helps! :)
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Please help i will give brainliest
arlik [135]
Here’s my answers, for #10 it got cut off but I got m=9/7 and d=11.40

6 0
3 years ago
Determine if (2, -1) is a solution to the system of equations:
stepladder [879]

The solution  to the system of equations is (x, y) = (2, -1).

<h3>What is a system of equations?</h3>

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

WE are given the  system of equations

2x−y=5

y = 2x - 5

y=3x−7

Adding the two equations Then divide by 2

Subtracting the second equation from the first gives;

0 = x -2

x = 2

y = -1

therefore, The solution is (x, y) = (2, -1).

The solution  to the system of equations is (x, y) = (2, -1).

Learn more about equations here;

brainly.com/question/25180086

#SPJ1

8 0
1 year ago
En una bolsa cerrada hay 45 euros en monedas de 2, 5, 10, 20 y 50 centimos. Si metiéramos en la bolsa una moneda de 5 céntimos,
beks73 [17]
Gvvuuc. Vfigvyhhvhuvvuvygtf
6 0
2 years ago
Can u pls help me with this question asap ​
serg [7]

Answer:

Either increase the number of acres that can be used for strawberry fields (by buying more land)..If we use the same numbers from earlier, then the farmer should use approximately 16.65 acres of land (or just 17 acres of land)

So if the farmer has 17 acres of land or more, then he will make more than $70,000 per year

Step-by-step explanation:

Use the proportions from earlier

We have the point (5, 21000)

70,000/21,000 = 3.3

To find the x-value multiply 3.3 by 5

3.3 * 5 = 16.65

We can even use the other point's values to find the exact same answer

Point (3.5, 14700)

70,000/14,700= 4.7619047619

4.7619047619 * 3.5 = 16.66 (literally about the same)

3 0
2 years ago
Please please help please please ASAP please I'm begging you please I have 10 minutes please y'all help please any ACE that can
skad [1K]

Answer:

6

Step-by-step explanation:

We know that the two quads are of similar and the ratio is 1:2, thus

AB/RS = 1/2

3/x = 1/2

x = 6

5 0
2 years ago
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