Answer:

Step-by-step explanation:
Given

Required
The equivalent expression
We have:

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Further expand

Apply laws of indices

Answer:
9 = x (assuming 15 is the hypotenuse)
Step-by-step explanation:
15^2 = 12^2 + x^2
225 = 144 + x^2
subtract 144 from both sides
81 = x^2
square root both sides
9 = x
Answer:

Step-by-step explanation:
The diagonals of a rectangle always bisect each other. Therefore, we can set
:

Answer: 3
Step-by-step explanation: