What property of equality would you use to solve x over 6 equals 7

Write two subtraction equations that are equivalent to 5 + 12 = 17.

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

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