Answer:
c
Step-by-step explanation:
Let x equal “a number”
3x+5=9
x=-4 and y=0
Answer: 11 pounds
x : # of pounds an electronic is
9.98 + 0.75x : total cost of shipping an electronic that is "x" pounds
9.98 + 0.75x = 18.23
0.75x = 8.25
x = 11 pounds