Carly bought a rectangular dining table that has a length of 6 feet and a width of 5 feet. What are the perimeter and area of Carly's dining table?

This doesn’t make sense to me it’s supposed to be lcm ( least common multiple )

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?