Three friends each have some ribbon carol has 42 inches of ribbon tino has 2.5 feet of ribbon in baxter has them when 5 yards of ribbon express the joy lines of ribbon the three friends had in inches feet and yards

12 inches=1 foot
1 yard=3 feet

ok
CAROL
42 inches
find how many 12's in it
42=12+12+12+6
each 12 is a foot
three 12's
and 6 left over
3 feet and 6 inches

TINO
2.5 feet
2.5=2+0.5
find what that 0.5 foot is in inches
1 foot=12 inches
0.5 foot=12 times 0.5
0.5 foot=6 inches
2 feet and 6 inches

BAXTER
5 yards
5 times 3 feet=15 feet

Carol=3 feet, 6 innches
tino=2 feet 6 inches
Baxter=15 feet

if you wanted ot add
3ft+6in+2ft+6in+15ft
3ft+2ft+15ft+6in+6in
20ft+12in
remember that 12in=1ft
20ft+1ft
21 ft

total is 21ft

ANSSWERS
Carol=3 feet, 6 innches
tino=2 feet 6 inches
Baxter=15 feet
total=21 feet