Adrian said that 21.8 × 1.9 equals 41.42. is adrian's answer reasonable?

Me what is the value of x? showing work would be appreciated - ! : )

Atriangle has side lengths of 15 inches and 30 inches. it also has angles that measure 45º and 20º. which of the following identifies the possible third angle of the triangle? a. 15 in., 65º b. 45 in., 65º c. 17 in., 115º d. 14 in., 115º

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )