What is the sum 2/x^2 + 4/x^2

Which of the following three dimensional figures has a circle as it’s base

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.

An isosceles trapezoid with a perimeter of 42 inches. each of the congruent non parallel sides is 5 inches long, and the trapezoid is 3 inches tall. how long are the two parallel sides? a. 10 in, 22 in b. 16 in, 16 in c. 10 in, 16 in d. 12 in, 20 in