Please help this is for a test online school sucks

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Answer asap ! the shortest path from point a to point b goes through a pond. to avoid the pond, you must walk straight 34 meters along one edge of the pond, then take a 90 degree turn, and again walk straight 41 meters along another edge of the pond to reach point b. about how many meters would be saved if it were possible to walk through the pond? a. 11 m b. 20 m c. 30.45 m d. 21.73 m

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²