Find the value of the coefficient a in the equation ax+2y=8, if the solution to the equation is the pair x=2 and y=1. HELP PLS

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

(50 points) drag each description to the correct location on the table. each description can be used more than once. some systems of equations and their graphs are given in the table. for each system, place the description(s) in the box that correctly describe the type of system shown. :