QUESTION 4 of 10: Your largest customer makes a purchase and pays $5,500 on account and $6,600 cash. How much was the purchase? 0000
a) $5,500
b) $6,600
c) $12,100
d) $11,100

Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)