How do you identify the opposite and the absolute value of a rational number

2 answers:

5 0

"The absolute value of an integer is its distance from zero on a number line. For example, the absolute value of -8 is +8, because -8 is 8 units from zero on the number line. Note that the absolute value of any positive or negative integer is positive." http://www.mathhelp.com/how_to/integers_and_the_number_line/opposites_and_absolute_value/

zhenek [66]3 years ago

4 0

Opposite:
Just change the sign.
If it's a positive number, make it negative.
If it's a negative number, make it positive.

Absolute value:
Even easier.
Just throw away the sign, and you have it.

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use a method of completing the square in order to rewrite the function f(x)=x^2+5x-2 in vertex form, f(x)=a(x-h)^2+k where (h,k)

yuradex [85]

      f(x) = x² + 5x - 2
f(x) + 2 = x² + 5x - 2 + 2
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4 years ago

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Ksivusya [100]

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4 years ago

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The radius of a quarter circle is 3 what is the quarter circle's perimeter?

slava [35]

Answer:

21.42

Step-by-step explanation:

Imagine it as a full circle. 3 x 4 will give you the diameter of a full circle, which is 12. circumference = pi x diameter. so 12 pi (we can work that out later). now for the quater circle, divide it by 4, so 3 pi. Then you have the 2 extra edges which are both 2r, so 6 each. finally, you have 3 pi plus 12 which = 21.42

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2 years ago

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Vaselesa [24]

Answer:

$\boxed{Area = 28.12 cm^2}$