Simplfy 7xy + 8x + 5xy + 6x

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 i need !

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Is the point (0, 8) on the x-axis or y-axis? how do you know?