Algebra 1 Hey so I got this question wrong on my quiz and I'm doing corrections, so I was wondering if anyone is willing to help me figure out this problem (don't know what I did wrong!) And please explain it! If you don't know the answer, or you're not sure, DON'T ANSWER! Thank you so much and any links will be reported!!

Problem:

-3√18 + 5√72 - √2

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest

Negative 5 1/12 + negative 4 1/4 + 6 3/4