How do I get the answer for 7/8+3/16

Gloria earns 1.5 times her normal hourly pay for each hour that she works over 40 hours in a week. Her normal pay is $9.70 per hour. Last week Gloria earned $489.85. How many hours did she work last week?

Jerry started playing video gamrs at 3:20. If he took a break at 7:15 how long had he been playing

Passes through (-5,9) and (1,3)

Shanice paid $3.82 for a sandwich. She now has $7.44. How much money did she have before buying he sandwich?

There are 250 economy class seats on board. The airline sells some economy class seats at a discount price of $440 in advance and reserve a number of seats to sell at the full price of $770.

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.