Z=9x+14xy for x what is x

What is the ratio of 15 and 40 in simplest form

Maria has $28 to spend on bottles of water Each bottle of water costs $1.29. There is a $1.50 recycling fee for buying bottled water.

A random sample of 150 recent donations at a certain blood bank reveals that 82 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of population having type A blood?

Fran paid a $50 registration fee to join the gym. she pays $20 each month. how much will fran pay for a year membership at the gym

A suit cost $95 Barry has a discount coupon for 10 %off and the city has 4.5%sales tax. what is the final cost of the suit?

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.