Math.Fractions.help? ;-; please

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Reflect the point (7,0) across the y-axis

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