A teacher has a 10m roll of ribbon 3 cm wide . She cuts off 7 equal lengths 3 cm wide to make team bands for PE . There is 90 cm of ribbon left . How long is each team bands

7x + 0.9 = 10

7x = 9.1

x = 1.3 meters

10.0 - 7 x = .90

7 x = 9.1

x = 1.3 meters

To find the length of each team band, we need to subtract the length of ribbon that is left from the original length and then divide the result by the number of team bands.

Given:
Roll of ribbon length: 10m (or 1000 cm)
Width of ribbon: 3 cm
Length of ribbon left: 90 cm

Step 1: Calculate the total length of ribbon used for the team bands.
Total length of ribbon used = Original length - Length of ribbon left
Total length of ribbon used = 1000 cm - 90 cm = 910 cm

Step 2: Count the number of team bands.
The problem states that the teacher cuts off 7 equal lengths for the team bands.

Step 3: Divide the total length of ribbon used by the number of team bands.
Length of each team band = Total length of ribbon used ÷ Number of team bands
Length of each team band = 910 cm ÷ 7 = 130 cm

Therefore, each team band is 130 cm long.