3 years ago

What are fractions used for?

Mathematics

2 answers:

mixas84 [53]3 years ago

8 0

Fractions are used for dividing things into equal portions.

user100 [1]3 years ago

5 0

Fractions are important because they tell you what portion of a whole you need, have, or want. fractions are used in baking to tell how much of an ingredient to use. fractions are used intelling time; each minute is a fraction of the hour.

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Simplify (8-7i)(-6+i)

Mrac [35]

Answer:

50 i - 41

Step-by-step explanation:

Simplify the following:

(-7 i + 8) (i - 6)

(8 - 7 i) (i - 6) = (8) (-6) + (8) (i) + (-7 i) (-6) + (-7 i) (i):

-6×8 + 8 i - 6 (-7 i) - 7 i×i

-6×8 = -48:

-48 + 8 i - 7 i (-6) - 7 i×i

-7 (-6) = 42:

-48 + 8 i + 42 i - 7 i×i

-7 i×i = -7 i^2:

-48 + 8 i + 42 i + -7 i^2

i^2 = -1:

-48 + 8 i + 42 i - 7-1

-7 (-1) = 7:

-48 + 8 i + 42 i + 7

-48 + 8 i + 42 i + 7 = (8 i + 42 i) + (7 - 48) = -41 + 50 i:

Answer: 50 i - 41

6 0

3 years ago

A number and its absolutely value are equal. If you subtract 2 from the number and its absolute value are not equal. What do you

Naily [24]

$n-the\ number\\\\|n|=n\ then\ n\geq0\\\\|n-2|\neq n-2\ what's\ a\ number\\\\I\ think,\ it's\ n=1\\\\because\ |1|=1\ and\ |n-2|=|-1|=1\ \ \ :correct\ \ :)\\\\3\ is\ not,\ because:\ |3|=3\ and\ |3-2|=|1|=1\to3\neq1$