1. The ratio of the perimeters of two similar triangles is 3 : 5. The scale factor is 3:5 and the ratio of their areas is 9:25. need work shown

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

The lengths of two sides of a triangle are 9 and 15. what can be said about the length of the third side? a. it must be greater than or equal to 6 and less than 24. b. it must be greater than or equal to 6 and at most 24. c. it must be greater than 6 and less than 24. d. it must be greater than 6 and at most 24.

In the expansion of (2m-3n)^9 one of the terms contains m^3. determine the exponent of n in this term