Penny wrote the same number of holiday cards each day for 6 days, and she wrote a total of 42 cards. Graph the line relating the number of cards, y, to the number of days, x. Write the equation of the line that represents the relationship?

Ineed with number 17 i don’t get it at alll

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?