One book costs £1.99 how much do four books cost?

How do I change mixed numbers into improper fractions

Find the equation of the axis of symmetry for the parabola y = x -

how do you divide 3.4 divided by 12.92

There are 15 cards numbered 1 through 15. What is the probability that you choose a 5 or a 9?

Sixty percent of eighth graders at the new middle school ride a bus to school. If 228 8th graders ride the bus to school, how many eighth graders are in the school?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.