Evaluate the expression: m-3n when m=8, n=2

A. 10
B. 2
C. 14
D. 13

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?