What is 5/8 + 3/10 in simplest form

The circumference c of a cirlce is product of two, pie, and the radius r

In a timed typing test, Lara typed 63 words per minute. Estimate the number of words she would be able to type in half an hour. Show your work

What are equivalent to 3 (n+2)

3 times (2+4) to the power of 2 - 2

Tyler needs at least $205 for a new video game system. He as already saved $30. He earns $7 an hour at his job. Write and solve an inequality to find how many hours he will need to work to buy he system. Interpret the solution.

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.