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inn [45]
3 years ago
12

When i was 18 years old, my sister was half my age. Now I am 82 years. How old is my sister now?​

Mathematics
2 answers:
iVinArrow [24]3 years ago
4 0

Answer:

41 \:  \:  \: years \:  \:  \: old

Step-by-step explanation:

me \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: sis \\ 18 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 9 \\ 82 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  x \\  \\ use \:  \: cross \: \\  multipaction \\ \\  18x = 82 \times 9 \\ 18x = 738 \\  \frac{18x}{18}  =  \frac{738}{18}  \\ x = 41

SVEN [57.7K]3 years ago
3 0

Answer:

<h2>41 y/o</h2><h2 />

Step-by-step explanation:

its a ratio and proportion:

<u>18 y/o  </u> =<u>   82 y/o    </u>    

9 y/o         x

82(9) = 18(x)

x = 738 / 18

x = 41 y/o

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Graphing sinusoidal functions I really need help.
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Hope this helps!
3 0
3 years ago
Can you help me with this question?
goldenfox [79]
We can start by saying that 4/3w+ 3/3w = 133.
we can simplify to 7/3w = 133.
multiply both sides by 3 to get 7w = 399.
divide both sides by 7 to get 57.
Mr. Wong's mass is 57 kg.
3 0
3 years ago
Find the area please
Natasha2012 [34]

Answer:

7.07

Step-by-step explanation:

3 0
3 years ago
Could someone explain this?
77julia77 [94]

9514 1404 393

Answer:

  2

Step-by-step explanation:

The curve's highest value is -1.

The curve's lowest value is -5.

For a symmetrical wave like this*, the amplitude is half the difference between the highest and lowest values:

  1/2(-1 -(-5)) = 2

The amplitude is 2.

_____

* There is no general agreement as to how to compute the amplitude when the wave is asymmetrical. Some authors use the same formula. Some consider the amplitude to be the maximum deviation from average. Some define only a "peak-to-peak" amplitude in those cases. The meaning of "amplitude" in those cases depends on the context in which the question is asked.

8 0
3 years ago
Factor 65x^2+212x-133 completely
worty [1.4K]
65x^2 + 212x - 133
you have to use the quadratic formula 
x=( -b +/- √b²-4ac) / 2a
a is 65
b is 212
c is 133
because the first value is squared you will have 2 answers
x= 7/13
x= - 19/5

4 0
3 years ago
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