Answer:
I think in grade 6th or 7th I star it learning those types of equations
Answer:
48 degrees
Step-by-step explanation:
7X-1+12x+48=180
19x+47=180
19x=133
x=7
7(7)-1=A
49-1=A
48=A
A is 48 degrees
answer: you would just substitute all of the values you see for b into the equation where there's a b
Complete the square:
That is, the graph of 
is a parabola with vertex at 
, meaning the ball reaches its maximum height of 
after 
of being thrown.
