A rectangle has length 16 cm and width w cm. If its perimeter is 42 cm, what is w?
Note
Use P = 2(l+w). Substitute: 42=2(16+w). Divide by 2: 21=16+w. So w=21-16=5.
A rectangle has length 16 cm and width w cm. If its perimeter is 42 cm, what is w?
Use P = 2(l+w). Substitute: 42=2(16+w). Divide by 2: 21=16+w. So w=21-16=5.