I REALLY NEED HELP NOW!! Calculate the AVERAGE SPEED of 400m in 80 seconds.

a. .2 m/s
b. 5 m/s
c. 32000 m/s
d. you need to use your calculator d/t = average speed

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

"curse these trig-loving pirates! " devora mutters as she looks at the map. then, after thinking for a moment, she walks back to the entrance of the secret cave, measuring 48 meters along the way. after performing a calculation, devora walks back to the empty treasure, faces the entrance, and turns a certain number of degrees to her left before walking 89 meters to the treasure. supposing that the angle at the cave entrance is acute and that devora's calculations were correct, how many degrees did she turn?