Use the following matrices, a, b, c and d to perform each operation. a = |3 1| |5 7| b = |4 1| |6 0| c = |-2 3 1| |-1 0 4| d = |-2 3 4| |0 -2 1| |3 4 -1| 40. a + b 41. b - a 42. 3c 43. cd 44. 2d + 3c

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

Askyscraper is 396 meters tall. at a certain time of day, it casts a shadow that is 332 meters long.at what angle is the sun above the horizon at that time?

Which expression is equivalent to -5(3x - 6/7)