Four times a number, minus 9, is equal to three times the number, plus 6

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

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?

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf