26.
. Георгий 3 часа двигался со скоростью 4км/ч, потом 2 часа - со
остью 3км/ч. С какой средней скоростью двигался Георгий на
протяжении всего пути?

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

How can you find the mean absolute deviation (mad) for this set of data?

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?