Find the number of units that produce the maximum revenue R = 900x - 0.1x, where R is the total revenue (in dollars)
and x is the number of units sold.

Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota