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2 years ago

Find the value of x.

Mathematics

2 answers:

zmey [24]2 years ago

8 0

Sin30=opposite side/hypotenuse side
=>1/2=X/25
=>12.5=x
Hope This helps u...!!

zaharov [31]2 years ago

6 0

$x = 25 \sin 30 = 25 (1/2) = \dfrac{25}{2}$

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D. y=-1/5(x)

Step-by-step explanation:

To find the equation of a line, use the formula y=mx+b, where x and y represent your x and y coordinates, m is your slope and b is your y-intercept.

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2 years ago

If f(x) =69-15x then f(f^-1(x))

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If f(x)=69-15x then $f(f^{-1}(x))=x$

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$f(x)=69-15x\\$

Lets find out $f^{-1}(x)$ . The steps to find out f inverse are

Replace f(x) by y

$y=69-15x\\Interchange \; the \; variables\\x=69-15y\\solve \; for \; y\\x-69=-15y\\Divide \; by \; -15\\\frac{-x+69}{15} =y\\Replace \;y \;with \; f^{-1}\\f^{-1}=\frac{-x+69}{15}$

Now we find $f(f^{-1}(x))$

Replace inverse function in the place of x in f(x)

$f(f^{-1}(x))=f(\frac{-x+69}{15} )=69-15(\frac{-x+69}{15})=69-(-x+69)=69+x-69=x\\f(f^{-1}(x))=x$

Learn more :

brainly.com/question/11242094

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