Find the height of a triangle with an area of 42 square inches and base of 7 inches. use the formula for the area of a triangle a=1/2bh

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

The sum of two numbers is 12 and their difference is 18 what are the two numbers

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.