Find the value of y for a given value of x, if y varies directly with x.

if y = 2.52 when x = 8.4, what is y when x = 2.7?

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

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?