For a certain company, the cost for producing x items is 45x + 300 and the revenue for selling x items is 85x – 0.5x^2 ​

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Miranda is braiding her hair.then she will attach beads to the braid.she wants 1_3 of the beads to be red.if the greatest number of beads that will fit on the braid is 12,what other fractions could represent the part of the beads that are red?

With finding limits of multi variable !