If she writes 6 checks for exactaly $19.98 what expression describes the change in her bank account

Write the sentence as an equation. b increased by 281 is d

Find the solution of system of equation y= x-4 y=4x+2

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