Answer:
Step-by-step explanation:
Let y represent students in the class
55% of y = 78
0.55y= 78
y = 142
b
Question 1= $7,620
Question 2 (a) $3,211
Question 2 (b) $9,828
Answer:9
Step-by-step explanation: x+4=13
x=13-4
x=9