Part A: 5 is the coefficient, w is the variable, 50 is the constant
Part B: 10 x 5 = 50 + 2 x 20 = 40+ 50 = $140
Part C: the constant,50,would change and become 85. Hope this helps :)
5x2 plus 3x =9 which is correct I think
10 because it makes the most sense
Your answer should be
16x^20 z^4
Formal decimal
Distance: 5.65