What is tip would you give to your waiter if your bill was $56.50 and the tip is 20% of the bill

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Write the expression as a single natural logarithm. 2 in a - 4 in y

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?