will subtracting two numbers without determining the absolute value of their difference always sometimes or never result in a correct distance?

Find the area of a parallelogram with base 15 yards and height 21 2/3

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Ten times the square of a non-zero number is eqaul to ninety times the number