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Kipish [7]
3 years ago
11

I need the answer to this question.

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
7 0

Answer:

The value of x is 9.

The value of y is 18.

Step-by-step explanation:

The given triangle is a right angled triangle.

We have: $ tan(x) = \frac{opp}{adj} $

Therefore, $ tan(30)  =  \frac{x}{9\sqrt{3}} $

Since, $ tan(30) = \frac{1}{\sqrt{3}} $

Therefore, we have:

$ \frac{1}{\sqrt{3}} = \frac{x}{9\sqrt{3}} $

$ \implies x = 9 $

Now, 'y' is the hypotenuse.

Use Pythagoras theorem, we have $ x^2 + (9\sqrt{3}})^2 = y^2 $

Substituting x = 9, we get:

81 + 81(3) = y²

$ \implies y^2 = 81 + 243 $

$ \implies y^2 = 324 $

$ \therefore y = 18 $

Hence, the value of y = 18.

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Write the number 3.8 in the form , using integers, to show that it is a rational number.
pantera1 [17]

9514 1404 393

Answer:

  3.8 = 38/10 = 19/5

Step-by-step explanation:

You can always represent a terminating decimal number as the ratio of integers. Count the number of decimal places, and multiply and divide it by 10 to that power. If you like, you can reduce the resulting fraction. 3.8 has 1 decimal place, so our chosen power of 10 is 10¹.

  3.8 = (3.8×10¹)/(10¹) = 38/10 = 19/5

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3 years ago
Write the sentence as an equation.<br><br> 351 is 59 subtracted from m
tino4ka555 [31]

Is means equal to.

59 subtracted from m would be m-59

Answer: 351 = m - 59

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3 years ago
last year 950 people attended a town's annual parade. This year $1,520 people attended. What was the percent increasse in ttenda
notka56 [123]
<h3>Answer:</h3>

60%

<h3>Step-by-step explanation:</h3>

The percent change can be found from ...

... ((new value)/(old value) -1) × 100%

... (1520/950 -1) × 100% . . . . . . filling in your numbers

... (1.6 - 1) × 100% = 60% . . . . . . simplify

Attendance this year was 60% higher than last year.

5 0
3 years ago
Which statement is true about the box plots?
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A

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6 0
4 years ago
Read 2 more answers
Show that if x, y, z are integers such that x^3+5y^3 = 25z^3, then x = y = 0.
Gre4nikov [31]

Answer:

3125*k^9 + y^3 is an integer my closure property.

 but 5^(1/3) is not an integer, which forces z to be irrational.

Note that there is no way an integer value can rationalize 5^(1/3)

Step-by-step explanation:

x^3 = 25z^3 - 5y^3

x^3 = 5 ( 5z^3 - y^3)

x  =  (5 ( 5z^3 - y^3) )^(1/3) must be an integer

  = 5^(1/3) * (5z^3 - y^3)^(1/3)

Then  (5z^3 - y^3)^(1/3) = 25*k^3 for some integer k

 5z^3 - y^3 = 15625*k^9

 5z^3 = 15625*k^9 + y^3

  z^3 = 3125*k^9 + (1/5)*y^3

z =  ( 3125*k^9 + (1/5)*y^3 )^ ( 1/3)

4 0
3 years ago
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