Determine whether n^2+20n+100 is a perfect square trinomial

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8