To solve the system of linear equations 8x+ 5y = 18 and 6x+y=-2 by using the linear combination method, Amos decided that
he should first multiply the second equation by -5 and then add the two equations together to eliminate the y-terms. His
calculations are as shown.

Tell whether the two rates form a proportion

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth

What is the slope of the line passing through the points (-5, 7) and (-3,5)?