30% of the 30 marbles is nine and 9-30 = 21 so your answer is 21
Usually, quadratic equations equal 0, and to find the solution you need to make x equal the value that, when added or subtracted to the rest of its bracket, makes 0. This means that your answer is (x + 5)(x - 2) = 0, because 5 - 5 = 0 and 2 - 2 = 0. I hope this helps! Let me know if you would like me to explain further :)
1/3 + 5/6 + 5/12
1.583333333333333
3/4. triangle FHE and triangle KMN; triangle GEH and triangle LNM
