Please help just answer the blanks I'll give a crown thing don't waste an answer.​

If a =6, what is the value of 2a(3b + 5c)?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]