Yes triangles always add up to 180
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If you multiply 3 by 10 and add a zero onto the ten in the question that is 100 in half an hour, all you need to do then is multiply that answer by two to get your answer.
Start - 45
week 1 - 52
week 2 - 59
week 3 - 66
week 4 - 73
week 5 - 80
week 6 - 87
week 7 - 94
week 8 - 101
All you do is multiply 15 and 6 you get 90. then divide 90 by 9 and you get 10.
