One person can do a certain job in twenty-one minutes, and another person can do the same job in twenty-eight minutes. how many minutes will it take them to do the job together? 6 min 12 min 24 min

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.

You borrow $25,000 to buy a boat. the simple interest rate is 4%. you pay the loan off after 10 years. what is the total amount you paid for the loan?