Simplify the expression. 14 + (-3) -3/7j - 6/7j + 6

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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.

How can you check that you have correctly converted frequencies to relative frequencies?