Which expression results in a rational number

One step equations: integers 3x=36

Jamal is told that it costs $24 plus a certain amount per day to rent a car. He finds that a friend rented a car from this company for $144 total for 3 days.

If employee a logged 120 hours in four years and employee b logged hours of travel at a 20% higher rate, how many hours did employee b have then employee a after 1.5 years

F (x) 2x²+1and g (x) = x²-7find (f+g) (x)

3! I need the answer to this its statistics

Write the sum as a mixed number with the fractional part less than one 1 1/6 + 3 3/6

A cyclist rides 6.9 km east for 23 minutes, then he turns and heads west for 7 minutes and 2.1 km. finally, he rides east for 12.6 km, which takes 42 minutes.

The cranberry sauce recipe called for 2 1/6 cups of white sugar and 4 2/3 cups of brown sugar. How many sugar is required?

My rule is: y = 1/3x + 11/15 Find x, if y=1.

What is 1.96 billion in scientific notation?