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Alexeev081 [22]
3 years ago
10

Find 3x-y-3z if x=-2, y=1, z=-2

Mathematics
2 answers:
horsena [70]3 years ago
8 0
Substitute everything in first


3(-2)-1-3(-2)


Then simplify


-6-1+6 = -1


The answer is -1
Mice21 [21]3 years ago
4 0
3 x (-2) - 1 - 3 x (-2) 
(Simplify by: Multiplying a positive and a negitive equals a negative: 
(+) x (-) = (+)) 
Multiplying two negitives equals a positive:
(-) x (-) = (+) )
-3 x 2 - 1 + 3 x 2
(Eliminate the opposites)
Answer: -1
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The string of a kite is 100 meters long and it makes an angle of 60° with the ground. What is the height of the kite?
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Answer:

  50√3 ≈ 86.6 m

Step-by-step explanation:

The geometry can be modeled by a right triangle with the height of the kite being the leg opposite the 60° angle. The hypotenuse has the given length of 100 m.

The mnemonic SOH CAH TOA reminds you that the relation between angles and the sides of interest here is ...

  Sin = Opposite/Hypotenuse

  sin(60°) = (kite height)/(100 m)

  kite height = (100 m)·sin(60°) = (100 m)(√3)/2

  kite height = 50√3 m ≈ 86.6 m

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A florist uses 10 red roses for every 4 white roses in her bouquets. What is the ratio of red roses to the total number of flowe
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The total number of roses is 14 and there are 10 red roses. For every 14 roses there are 10 red roses.
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The quantity q varies inversely with the square of m and directly with the product of r and x. When q is 2.5, mis 4 and the
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Answer:

The constant of proportionality is 5.

Step-by-step explanation:

If the quantity q varies inversely with the square of m and directly with the product of r and x, then the variation equation is

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When q=2.5, m= 4 and the

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We plug in this values to get;

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