Xavier has $23.50 in his savings account. he deposits $35 every week. his mother also deposits $20 into his account every time xavier washes the car. his savings account balance can be shown with the following expression.
20c+35+23.50
part a: identify a coefficient, a variable, and a constant in this expression. (3 points)
part b: if xavier saves for 12 weeks and washes the car 3 times, how much will he have in his account? show your work receive full credits. (4 points)
part c: if xavier's mother deposited $25 after each car wash, would the coefficient, variable, or constant in the expression change? why (3 points)

Select all the correct answers. which statements fail to meet the requirements of a scientific claim? a) in the final 100 meters of a 10,000-meter race, an athlete's speed is more strongly related to anaerobic efficiency than to aerobic efficiency. b) flowers that reflect the most ultraviolet light are more likely to attract bees and other pollinators than flowers that reflect less ultraviolet light. c) even though evidence indicates that the solar system's planets follow elliptical paths, copernicus's model involving circular orbits is true. d) the evidence supporting newton's laws of motion was accurate in newton's time, but the universe operates differently today.