If r(x)=7/x squared and t(x) = 5/3x, find (r-t)(x)

(r - t)(x) =

Step-by-step explanation:

Given that, and

Therefore, (r - t)(x) = r(x)  - t(x)

{This is a kind of operation on function, in our case it is subtraction operation}

⇒ (r - t)(x) =  

⇒ (r - t)(x) =

⇒ (r - t)(x) = (Answer)

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.