PLEASE HELP SOLVE FOR X THIS IS PRE-CALCULUS UNIT TEST I NEED ABOVE AN 80%!

How can you construct perpendicular lines and prove theorems about perpendicular lines

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

Af jewelry box is in the shape of a rectangular prism with an area of 528 cube inches. the length of the box is 12 inches and the height is 5 1/2 inches. what is the width of the jewelry box