Options: A. the water level started at 40mL
B. The change in the amount of water over time has a negative slope
C. The water was gone by the eighth day
D. The amount of water in the beaker decreased by 40mL

3x + 4y = 5 x- 3y = -7 solve by substitution

Can someone explain to me how to do

In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. suppose you drew a circle graph to represent this information, what percent of the graph represents housing?