Which table shows a proportional relationship between x and y?
a x 40 50 60 90
y 8 10 14 18
b x 2 4 7 8
y 6 10 21 24
c x1 2 3 4
y 6 8 10 12
d x 4 7 8 10
y 2 3.5 4 5

What is the value of x in the this question ?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

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?