Which expression can be used to find the area of the rectangle shown on the coordinate plane?
6х7
7x7
8x7
8x8

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0