1/2 base by height
Your answer is 6
You'll need to multiply the function out to get it in the form y = ax^2 + bx + c, in this case it would be y = 4x^2 + 16x + 20.
We can immediately see that y = 20 would be the y value for the pivot point for the equation, and since the equation is positive it woukd have a concave shape. Thus it woulc be a minimum of 20, since there are no points lower than that on the y-axis.
Plotting functions like this on desmos helps you get a better understanding of how they work. I recommend you try! ;)
15 if u count by fives u get 15
hope this helps :)
Supplementary angles add to 180
28.5+x=180
x=151.5
Final answer: 151.5