Please help me with my math problems

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

The constant of proportionality is always the where k is the constant of proportionality. additionally, you can find the constant of proportionality by finding the ratio for any point onasap

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).