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xxTIMURxx [149]
3 years ago
12

For any integer x,x2-x will always produce an even value

Mathematics
1 answer:
Levart [38]3 years ago
8 0

Consider expression x^2-x. First, you can factor it:

x^2-x=x(x-1).

Since x is integer number, then you can see that x-1 is previous integer number (x-1 is 1 unit smaller than x).

Therefore, x-1 and x are two consecutive integers. When you have two consecutive integers, one of them is always even and one is always odd. Multiplying even integer number by odd integer number you always get even integer number.

Thus, x^2-x is always even.

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7nadin3 [17]

1 mile * 5280 ft * 12 in = 63360 in

There are 63360 inches in one mile

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3 years ago
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Equation for cost of <br> beans and rice
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is there a passage or sum?

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3 years ago
4) FRIDAY: An unknown quantity which is represented by a letter or a symbol is called _____
lukranit [14]

Answer:

A Variable

Step-by-step explanation:

Variables are used to mark an unknown value. Common math problems ask you to solve for it.

For example in 5x+23=45, 'x' is the variable.

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<em>Brainilest Appreciated. </em>

8 0
3 years ago
A school had a girl:boy ratio 5.4.
Ilya [14]

Answer:

164

The 982 part seems wrong. Are you sure it isn't 981?

around 436 if I use 981 instead. 982 would give a decimal and that would be kinda weird for a part human.

Step-by-step explanation:

You can divide the 205 by 5 to simplify the ratio down. 205/5 = 41. Then you can multiply by 4 to find then number of boys.

981

So you can add the 5 and 4 together to 9 and then divide 981 by 9 to get 109. Then you can multiply by 4 to get 436.

Hope this helps!

8 0
3 years ago
What would be the equation -2x+y+3=0 in y=mx+b form?
ololo11 [35]

Answer:

The answer is y = 2x - 3.

Step-by-step explanation:

Move 2x to the right side of the equation by adding it to both sides:

-2x + y + 3 = 0

<u>+ 2x             + 2x</u>

y + 3 = 2x

Then, move 3 to the right side of the equation by subtracting it form both sides:

y + 3 = 2x

<u>   - 3    - 3</u>

y = 2x - 3

8 0
3 years ago
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