Find the coefficient of x3 in the expansion of (2x-1)

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Write the expression as a single natural logarithm. 2 in a - 4 in y