If a certain vase contains only roses and tulips, how many tulips are there in the vase?
i. The number of roses in the vases is 4 times the number of tulips in the vase.
ii. There is total of 20 flowers in the vase
On a certain nonstop trip, Marta averaged x miles per hour for 2 hours and y miles per hours for the remaining 3 hours. What was her average speed in miles per hour for the entire trip?
i. 2x + 3y = 280
ii. y = x + 10
Find the next number in the series: 3, 6, 4, 9, 5, 12, 6 ________
0.1 + (0.1)2+ (0.1)3 = ?