Do you help me plis

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Why is x= 4 a solution to the proportion 14/x 56/1 6

Analyze the diagram below and complete the instructions that follow. 56 find the unknown side length, x write your answer in simplest radical form. a 2047 b. 60 c. sv109 d. 65 save and exit next s and return