How many years is tween 1844 to2015

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

A25- foot ladder leans against a building and reaches a point of 23.5 feet above the ground .find the angle that the ladder makes with the building

Which number can each term of the equation be multiplied by to eliminate the decimals before solving? 5.6j- 0.12=4+1.1j