Need a step by step explanation for this

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?

What is the expression equivalent to (3x^2-7)