In the picture triangle abc is an image of triangle abc after a rotation the center of rotation is d what is the measure of angle b

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2