The temperature at 9 A. M. was 42°F. The next four hours the temperature dropped 2 degrees per hour. What was the temperature at 1 P. M.?

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

Write the rational number in lowest terms 99/-15

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries