How to do this two step equation

6a-11=13

1) Find the area of a parallelogram with base b and height h b=82 cm h=16.6 cm a) 1,361.2 cm² b) 6,724 cm² c) 137.78 cm² d) 98.6 cm²

What is greater - 5 3/5 or - 5 6/9

If 12 counters is 3/4 of a set what is the whole set?

3,4 the common multiples of each pair of numbers

Bill drove 715 miles in 11 hours. At the same rate, how long would it take him to drive 455 miles?

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.