Which of the following a proportion? 2/5 = 4/25, 4/6 = 6/9, 4/3 = 6/8, 5/6 = 10/18

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Under normal conditions, 1.5 feet of snow will melt into 2 inches of water. during a winter season high in the mountains, 301 feet of snow fell. how many inches of water will there be when the snow melts?

Find the difference (8ab+a+2) - (3ab+6)