The values of two antiques were observed for a period of 50 years. the following equations model the value of each antique, where y is the value of the antiques and x is the number of years after observations began. antique 1: y=−x^2+50x antique 2: y= 10x+175 determine when the two antiques had the same value. select all that apply.
a. after 5 years
b. after 40 years
c. after 35 years
d. after 50 years