Me the question says to write down a subtraction problem where two positive numbers are subtracted to obtain -9

The production line where you work can assemble 5 appliers every 30 minutes at this rate how long should it take the line to assemble 125 amplifiers

Divide. write in the simplest form. 4 1/6 divided by 10

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.