Which operation transformed matrix I to matrix ll? [1 2 1 |5] [1 2 1 |5]
[0 1 2 |5]-> [0 1 2 |5]
[2 78 |25] [0 3 6 |15]
A. -1/2R3+R1->R3
B. 1/2R3-1->R3
C. 3R2->R3
D. -2R1+R3->

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?