When my father was 31 i was 8. Now he is twoce as old as me. How old am i?

Can u explain to me this question

A train goes twice as fast downhill as it can go uphill, and 2/3 feet as fast uphill as it can go on level ground. if it goes 120 miles per hour downhill, how long will it take to travel 45 miles per flat land?

Chad has a rope that is 15 yards long. How many pieces of rope measuring of a yard can he divide his rope into?

Celeste is making lemonade. She mixes 6 pints each of fresh squeezed lemon juice and water. How many fluid ounces does lenonade does Celeste make?

Suppose 10% of the flights arriving at an airport arrive early, 60% arrive on time, and 30% arrive late. Valerie used the random-number table to find the experimental probability that of 5 flights, at least 2 will arrive late.

If s (x) = x - 7 and t (x) = 4x2 - x + 3, which expression is equivalent to (t*s) (x)

A cylindrical tank with radius 5 m is being filled with water at a rate of 2 m3/min. how fast is the height of the water increasing?

Which of the following represents 84 = 7 * 12? A. 84 is 7 times as many as 12 B. 12 is 7 times as many as 84 C. 84 is 6 times as many as 14 D. 7 is 12 times as many as 84

If a square has an area of 1255 sq yards, what is the length of one of the sides of this square?

There are 7 scissors in the drawer. Keith placed 2 more scissors in the drawer. How many scissors are now there in total?

What is the mode of the following numbers? 4,9,6, 3, 4,2