Answer:
a. 90/ 4.5 = 20 flags per yard
b. 4.5/ 90 = 0.05 = 5 hundredths of a yard
c. 0.75 x 3 colours = 2.25 yards
4.5 = 90 flags so 4.5/2 = 2.25 = 45 flags
Justifies she is correct when saying 45 flags can be made with 3 x 0.75 material as this is equal to 2.25 yards which is half of 4.5 yards equal to 90 flags.
To find 4.5 we have 3 pieces of material to begin with for part a and part b
This shows 1.5 x 3 = 4.5 yards
To find 2.25 we have 3 pieces of material in part c.
This shows 0.75 x 3 = 2.25 yards