Jessie is shopping for clothing gifts for her friends. On the first trip to the store, she purchased 4 t-shirts and 7 scarves and spent $93. On her next trip to the store, she purchased 3 more t-shirts and returned 2 scarves and paid $19. What was the cost of each item? Please explain

Not confident in this answer but $9.30  ¯\_(ツ)_/¯

Step-by-step explanation:

What he said

Step-by-step explanation:

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb