Write an equivalent expression by simplifying the expression using combining like terms. 18x + 4y - 8x + 2

1. what are the missing reasons in the proof 2. it's in the second picture and 3

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x