How to solve y=3x+2 and -4x+2y=8 with elemination

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.