How to solve 45=6n+3n

Acircular hot tub located near the middle of a rectangular patio has a diameter of 48 inches. the patio measures 11 feet by 6 feet. what is the area of the patio that is not covered by the hot tub?

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth