What is 15-8 equals?

Is 2-3-4-5-6-7-8-9-10 divisible by 810? What is round 17.3 to the nearest whole number? How do you make an improper fraction in to a whole number? What is 1.00 - 82p equal to? Im a two digit number in a square number is greater than 29 and less than 42? An observer who is 6 ft tall has an angle of elevation of 60 to the top of a tree and is standing 20 ft from its base How tall is the tree? What is the value of 20 Subtracted by B when B Equales eight? What is the LCM of 12 18 40? What is the LCM of 10 14 and 18? What kind of graph shows comparisons? When solving by the substitution method what happens when one variable cancels out? What are 8 groups of 4? What are the multiples of 3 that are greater than 80 and less than 90? How long would it take you to arrive at your destination if it was 60 miles away and your speed was 40 mph? What is 210000000000000000000? How many hours is 630am to 5pm? What is bigger 200 m or 20000 mm? What is the ticker symbol for Optimum? 6000 minutes is equal to how many hours? What is 13 thousandths as a decimal?