Question

a teacher has 30 pencils and 45 erasers. she wants to make identical supply bags. which expression shows the most bags she can make using gcf?
A.3*(10+15)
b. 5*(6+9)
C. 15*(2+3)
D. 10*(3+5)

Answer 1

C. 15*(2+3)

Reason: The GCF of 30 and 45 is 15. That gives 15 identical bags, each with 30/15 = 2 pencils and 45/15 = 3 erasers, so 15*(2+3).