When the father was as old as his son is, the sum of their ages then was 38. When the son would be as old as his[..]

Two taps 'A' and 'B' fill a swimming pool in 15 days. Taps 'A' and 'B' are kept open for 12 days and then tap 'B' is[..]

if 2^x+3*3^x+4=18, then x=

find the lenght of the base of a pyramid with a rectangular base whose width is 18 cm and whose altitude is 36 cm.

The word is The perimeter of a rectangle is 146m. The length is 10 m more than twice width. Find the dimensions.

The perimeter of a rectangle is 146m. The length is 10 m more than twice width. Find the dimensions.

The difference when a number z is subtracted from sixteen is two.

The rapids drop 72 feet vertically over a horizontal distance of 824 feet. what is the slope of the rapids? Round[..]

a plane flies 285 km due west and then 320 km due north. what is its distance and bearing from the starting point?

a chemist has three samples of unknown masses and three samples of known masses. any two unknown masses can be[..]