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->

The spring the owner of a sporting good store decreases the price of winter gloves from $10 to $8 each increases the price of swimming goggles from $8 to $10 without doing the math you think the percent decrease in the price of the gloves the same as the percent increase of the goggles explain why or why not

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?

2and 3 are angles. complementary vertical congruent supplementary