1 Katie knew that 70 + 70 = 140. Explain how she can use this double to solve 70 + 80

What is the product of the radical expression. (7-2square root) (8+2 square root)

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

What two criteria are needed for triangles to be similar