I need to know the area of this triangle and I would like to have an explanation because I dont know how to do it I know the formula just not how to get the height

What is the vertex form of f(x) = x2 + 6x + 3

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers