Find the period of the graph

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

What is not true about kl and mn? what is mn? (show )

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of