If you add 15 to 3 times the mystery number you get 78 was the mystery number

What is chemical formula of caliche?

A train is traveling 3100 miles from New York to California at an average speed of 55 miles per hour after t miles the distance remaining is less than 1200 miles write an inequality to represent the situation

A patient receives milligrams (m) of medication per dose. Her doctor orders her medication to be decreased by 25 milligrams. How much medication will she receive per dose? Write an algebraic expression

A 4-foot piece of aluminum wire costs $6.72. What is the price per inch?

E^2x + 3e^x - 18 = 0

A factory 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 this purple paint.

Sierra has 3 days to drive 932 miles. She wants to have completed 75% of the drive by the start of day 3. What distance should she drive on each of the first two days?

36 is how many times greater than 6? 4 6 9 5

Q+r/s when q=31, r=48, and s=6

What is 0.4% written as a decimal?