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Mathematics

1 answer:

amm18124 years ago

6 0

Complementary is when angles equal 90 degrees.

supplementary is when angles equal 180 degrees.

a)

supp:145 degrees
comp:55 degrees

b)

supp:23 degrees
comp: none

c)

supp:159 degrees
comp:69 degrees

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The sum of three consecutive numbers is 12 find the numbers

snow_tiger [21]

Let x,y,z be those numbers.
x+y+z = 12
Since x,y,z are consecutive: y=x+1, and z = x+2
Let's replace y and z by their new values:
x+x+1+x+2=12
3x+3=12
You subtract 3 from each side to get variables on a side, and numbers on the other:
3x=9
You divide both sides by 3:
x=3

y=x+1 = 3+1 = 4
z=x+2 = 3+2 = 5

So the numbers are 3; 4 and 5.

You can re-check your answers (very important):
3+4+5 = 12
3;4;5 are consecutive numbers.
The answer has been approved.

Hope this Helps! :)

7 0

3 years ago

When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus

Blababa [14]

Answer:

By the Empirical Rule, $\pm 3\sigma$