ethan and david are brother. ethan is three years older than david, and the sum of their ages is 17, how old is david?

What's the reciprocal of 10/3

What is the sum of the first 10 positive integers? A) 55 B) 50 C) 100 D) 95

22 customers are eating dinner at an Italian restaurant. Of the 22 customers, 18 order pizza, 10 order a salad, and 8 order pizza and a salad. Using this information, answer each of the following questions.

How many slices of pizza are on the table

Find an autonomous differential equation with all of the following properties:Equilibrium solutions at y=0 and y=3, y' > 0 for 0 < y < 3; and y' < 0 for - inf < y < 0 and 3 < y < inf.

Jack and Harry are waiters in a restaurant. Jack worked 6 hours and is paid £48 Harry worked 5 hours and is paid £45. A] Who earns more? B] What is the ratio of Jack and Harry's hourly pay?

77/11 in simplest form

A school administrator selects every 20th person on the list of names alphabetically to see what the favorite school subject is. Is this biased?

Daniel had $28 to spend at the fair. If the admission to the fair is $8 and the rides cost $2 each, what is the greatest number of rides Daniel can go on? A. Write an inequality that represents Daniel's situation. B. How many rides can Daniel go on?.

Liam is a tyre fitter. It takes him 56 minutes to fit 4 tyres to a van. a) How long would it take him to fit 12 tyres to three vans? b) If he works for 42 minutes, how many tyres can he fit?