What is the value of "twelve more than the quotient of a number and two, decreased by four" when n = 4?
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steps and answers in the pic..hope u can understand the calculations...
Keeping in mind that the area of a rectangle is simply width * length, if we get the area of the larger rectangle, and then subtract the area of the smaller rectangle, we're in effect making a hole in the larger rectangle's area and thus what's leftover is the shaded area.
