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Nonamiya [84]
3 years ago
8

The table shows the wavelength of the sound produced by keys on a piano x keys away from the A above middle C.

Mathematics
2 answers:
Virty [35]3 years ago
5 0
B) 49.44 is the right answer
ZanzabumX [31]3 years ago
3 0

"b" on e2020 is correct

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Could someone please explain this problem to me?
disa [49]

Answer:

8/3

Step-by-step explanation:

Because all 4 angles are congruent, the sides are proportional.

the scale factor is 5/30 = 1/6.

meaning x = 16(1/6)=8/3.

7 0
2 years ago
Help me pls.......... ​
CaHeK987 [17]

Answer:

x = 72 , y = 108

Step-by-step explanation:

2x and \frac{x}{2} are adjacent angles on a straight line and sum to 180° , that is

2x + \frac{x}{2} = 180 ( multiply through by 2 to clear the fraction )

4x + x = 360

5x = 360 ( divide both sides by 5 )

x = 72

--------------------------

\frac{x}{2} = \frac{72}{2} = 36

\frac{x}{2} and \frac{y}{3} are vertically opposite and are congruent , then

\frac{y}{3} = 36 ( multiply both sides by 3 )

y = 108

3 0
3 years ago
After constructing a relative frequency distribution summarizing IQ scores of college students, what should be the sum of the re
saul85 [17]

Answer:

  • <u>Option</u><u> </u><u><em>A</em></u><em>. If percentages are used, the sum should be a 100%. If proportions are used, the sum should be 1.</em>

Explanation:

The <em>relative frequency</em> can be measured as a ratio (proportion) or as a percentage.

As a ratio, the relative frequency is the number of times that the desired outcome is observed (either theoretically or experimentally) divided by the total number of  possible outcomes (theoretically) or  observed (experimentally).

As a<em> percentage</em>, the relative frequency is the ratio multiplied by 100.

This shows it mathematically:

  • relative frequency of event 1 = frequency of event 1 / number of events

  • relative frequency of event 2 = frequency of event 2/number of events

  • relative frequency of event n = freqquency of event n/number of events

  • Total relative frequency = sum of of relative frequencies

                                       = sum of all (n) frequencies / number of events =

                                       = number of events / number of events = 1

As a percentage, total relative frequency = 1 × 100 = 100

7 0
3 years ago
Explain how the expression 8.3√2+7.9√2 can be simplified using the distributive property.
IceJOKER [234]

Answer:

\sqrt{2}(16.2)

Step-by-step explanation:

The distributive property says that the answer of multiplying two numbers is the same as multiplying the first number by the sum or subtraction of two numbers that result in the second number.

What we have to do is to simpligy the ecuation, this mean, making it shorter.

First we take out the common term of the ecuation: \sqrt{2}.

By distributive property 8.3\sqrt{2} +7.9\sqrt{2} =\sqrt{2}(8.3+7.9)

then \sqrt{2} (16.2).

3 0
3 years ago
mr. Nolan's code for ATM card is a four digit number. the digits of the code are prime factors of 84 listed from least to greate
Artemon [7]

Answer:

84/2= 42, 42/7= 6, 6/3= 2

84 = 2 x 2 x 3 x 7

ATM card = 2237

8 0
3 years ago
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