how do you write these factions in simplest form1/2 * 5/8 *4/5-3/8 / 3/4-16/9 / 8

My favorite songstress gives away 25% of this side of her signature fragrance collection to her charity last month her sales were 1200 how much of her sales did she donate

Karianne and lucius are analyzing a linear function on a graph. karianne says that unit rate is equal to rate of change, but that slope is calculated differently. lucius says that unit rate, rate of change, and slope are calculated the same way. who is correct? explain your answer.

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0