A right triangular prism is a solid that has faces that consist of 2 equilateral triangles and 3 congruent rectangles. It is also described to have two parallel faces, and 3 other faces that belong to the same place (and are not parallel to the parallel pair of faces).
3x + 2y = 12
2y = -3x + 12
y = -1.5x + 6
The number is (2√3) / 3
To find the missing number, convert what it says in words to an equation:

Divide both sides by 15:

Take the square root:
Is it 22.5 b/c 22.5 *2 = 45 and 22.5 +22.5= 45. or do u mean both numbers have to be the same