What is the value of 20 x 4 - 100 ÷ 20?

The perimeter of a rhombus with a side of 6 is 24

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1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)