1. What ia the value for x in the proportion 4:8 = 20: x? 2. What is the for s in the proportion 3:27 = s:9 ?

3. if L=x-y , find L when x= 10 and y= -3

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Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Ineed to know the answer to this algebra question.

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20