Which of the following expression eqaul to -4x^2-36

Which expressions are equivalent to -6 + 3m

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c