How many solutions does the system formed by x - y = 3 and ay + 3a = 0 have for a non zero number a? explain and show how you get the answer

Three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder ( ! : ”0 )

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?