PLEASE HELP. y is directly proportional to √x.
y is 80 when x=100.
Find a formula linking x and y.

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?