Which equation is part of solving the system by substitution?
x+y=11
4 + 11) - 3y = 8
4(11-yje - 3y=8
40 - 11) - 372 = 8

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30