Answer:
one expression you could use could be, 10.25A +8.50K=total
Step-by-step explanation:
you would take 1.75 and add it to the 8.50 for the adults and 6.75 for the kids
$8.50a+$6.75k+$1.75a+$1.75k
No
7x+1 means 7 x X + 1
1xt7 means 1 x X x T x 7
so they are different