What's 21/9 in the simplest form the answer

1/4 - 3/5 write your answer is simplest form

What is the value of c such that x2 + 10x + c is a perfect square trinomial?

A rectangular garden is 10 ft longer than it is wide. Its area is 1575 ft. What are its dimensions? W= L=

What do you add to 5 1/7 to make 9

Rewrite 2x - 2y = 8 in slope-intercept form.

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.