Use 6 triangles then 2 square so you will only be using a total of 4 square and 12 triangles
It would be the first one because it’s going up by a constant rate
18). 16:80 is the ratio but in simplest form is; 5:0
19). 36:54 is the ratio but in simplest form is; 2:3
20). 12:24 is the ratio but in simplest form is; 1:2
hope that helps:D
Answer:
1 7 13 91 prime factors in ascending order
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