X - 6 is th algebraic expession for six lss than a number. x represents the number and you are taking 6 away from it. This is the basis of all algebra
If I am not mistaken the inequality would be 45x is greater than or equal to y since the minimum would be 45 minutes a day.
Its 89 because 9 times 2 is 81 and 10 times 2 is 100 there nothing to multiple 2 by something to get 89
Answer:
the volume of this is 36cm