help me out please with this math problem (pic down below) 30 points and a Brainliest for the correct ) also this is algebra 1

9 trays

Step-by-step explanation:

for deli A, (9 trays * $7.50) + $18 delivery = $85.50

for deli B, (9 trays * $9.50) + $0 delivery = $85.50

if you need to check your other answers, substitute the 9 trays for another number and you'll see the end price is different.

step-by-step explanation:

b and c