She has used 630 min
1400*.45=630
.45 is equal to 45%
Your answer is D) 130
This is because <1 and <2 form a linear pair, and their measurements add up to 180
to find <1, use 180- 50
you get 130, which is how you get your answer
Hope this helps!
For one 3, another 7, and 9
