Answer:
2x+y=105 and x+4y=105 are the system of equations that can be used to find the cost of each item
Step-by-step explanation:
300 x 0.4 = 120
120 x 3 = 360
a. $360
300+360= 660
b. $660
2000 x 3.5 = 7000
7000 x 4 = 28000
a. $28,000
2000 + 28000 = 30000
b. $30,000