Answer:
My own answer to your question is x=10
The answer is D, the ordered pair (5,3)
2 times (9+7) is correct.
9 + 7 = 16.
16 multiplied by 2 is 32.
Length = √area = √81 = 9
diagonal = √2 * side = √2*9 = 9√2
First three. A, b, c.
The triangle is a right triangle.
The triangle is a Pythagorean triple.
The triangles hypotenuse is 39 inches.