Find the difference in altitude between a mountain that has an altitude of 2889 feet and a desert valley that is 139 below sea level

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]