Decide whether or not each equation represents a proportional relationship. Volume measured in cups (c) vs. the same volume measured in ounces (z): c=18z Area of a square (A) vs. the side length of the square (s): A=s2 Perimeter of an equilateral triangle (P) vs. the side length of the triangle (s): 3s=P Length (L) vs. width (w) for a rectangle whose area is 60 square units: L=60w

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Which number completes the system of linear inequalities represented by the graph? y> 2x – 2 and x + 4y 2 et 2 3 4