6. solve by elimination:
4x + y = 7
3x - y = 0

What situation is an example of an observational study

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Write a description of each inequality. 1. -5a + 3 > 1 2. 27 - 2b < -6 (this < has a _ under it) 3. 1/2 (c + 1) > 5 (this > has a _ under it)