Y = 3x 5x - 4y = 21
The system of equations above has solution (x, y).
What is the value of x + y?

This graph represents four ecosystems. each ecosystem has a different number of species, adding to its biodiversity. different colors represent different species. which statements correctly summarize the data depicted by the graph? 1. ecosystem d has more biodiversity than ecosystem c. 2. ecosystem b has more biodiversity than all the other ecosystems. 3. ecosystem a has more biodiversity than ecosystem b but less biodiversity than ecosystem c. 4. ecosystem b has more biodiversity than ecosystems c and d but less biodiversity than ecosystem a. 5. ecosystem a has more biodiversity than ecosystem c but less biodiversity than ecosystem b.

How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity

Jak s¹dzisz-czy w czasach wspó³czesnych pytania o powstanie, naturê oraz przeznaczenie œwiata i cz³owieka sa nadal aktualne? a mo¿e juz przesta³y byæ wa¿ne i to jest jêzyk polki kl 5 zad 8 str 136