Can someone please help me with this. fast.

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Which best describes the construction of a triangle if given the segment lengths of 2 cm, 3 cm, and 5 cm? a) unique triangle b) cannot be determined c) triangle not possible d) more than one triangle