How do you simplify 2 (4x -3) -7 (x 1)

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i