What is equivalent to the expression (x+3)(x-7)+(x+8)(x+3)

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Three times the sum of a number and seven is negative thirty-six. what is the number?