To get the vertex of the parabola we proceed as follows;
y=-7(x-4)^2-5
The above can be written as:
y=-7x^2+56x-117
The values of a,b and c are:
a=-7, b=56 and c=-117
x=-b/(2a)
x=-56/(-7*2)=4
but;
y=-7x^2+56x-117
y=-7(4)^2+56(4)-117
y=-5
Thus;
x=4 and y=-5
The vertex will be at point (4,-5)
21.25% because 85/400 = .2125 which is 21.25%
Answer:
A 17
B 11.5
Step-by-step explanation:
5+2=7+2=9+2=11+2=13+2=15+2=17
and please check ur question C and D
