The rectangle below has an area of
49
−
x
2
49−x
2
49, minus, x, squared square meters and a width of
7
+
x
7+x7, plus, x meters.
What expression represents the length of the rectangle?

Mikael, hema and 5 friends will run an event. they will wear either a red shirt or red baseball hat during the event. they want to spend exactley $40. shirts cost $8 each and caps cost $4 each.