Ken paid $12 for two magazines the cost of each magazine was a multiple of $3 what are the possible prices of the magazines

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3

Is the power produced directly proportional to the wind speed, give reasons for your answer?