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Alenkinab [10]
3 years ago
8

Find the value of x

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
8 0

<em><u>x = 10.4 (1dp)</u></em>

Step-by-step explanation:

Using Pythagoras' theorem, a^2 = b^2 + c^2 where a is the hypotinues; b and c is the two sides

a^2 = b^2 + c^2

12^2 = 6^2 + x^2

144 = 36 + x^2

x^2 = 144 - 36

x^2 = 108

x = _/108

x = 10.4 (1dp)

Roman55 [17]3 years ago
8 0
To my calculations the anwser is x=10.4
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John's age is 4 more than 3 time Mike's age. If their sum is 20, how old are Mike and John?
natima [27]
Let me help you with this :)

John = x 
Mike = y

x = 4 + 3y (4 more than 3 times)

x + y = 20 (we put the x above into this equation)

4 + 3y + y = 20 
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y = 4 (the answer is 4)

we use this for the equation:

x = 4 +3*4
x = 16

John is 16 years old and Mike is 4 years old :)

6 0
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7 0
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V125BC [204]
I have no idea. Quick question for you though since we are working on similar stuff. How do I write this equation in graphing form: y=2x^2-12x+19
6 0
3 years ago
If sin theta = -0.7660, which of the following represents an approximate value of tan theta, for 180 degrees &lt; theta &lt; 270
Elis [28]
We have that
sin ∅=-0.7660

the sin ∅ is negative
so 
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but
180°< ∅ < 270°
hence
∅ belong to the III quadrant
sin ∅=-0.7660
sin² ∅+cos² ∅=1
cos² ∅=1-sin² ∅------> cos² ∅=1-(0.7660)²-----> 0.4132
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the answer is
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4 0
3 years ago
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