The equation for this is ; y=1/2(x+4)^2-1
Explain
we use the vertex form
y=a(x-h)^2+k where the vertex is (h,k)
Select ( -4,-1)
Where h=-4
K=-1
y=a(x-h)^2+k
We get
y=a(x-(-4))^2+ -1
Y= a(x+4)^2+-1
Now replace to 0,7
7=a(0+4)^2-1
7=a(4)^2-1
7=16a-1
So now
7=16a-1
7+1=16a
8=16a
a=8/16
That should 1/2
So y=a(x+4)^2 -1
Should become
Y=1/2(x+4)^2 -1
Do you have any doubts now !
This is how I figure these type of questions out you can draw a circle on the J,K,L the trace it to make a triangle it should be less then 90 degrees if not then you might’ve traced it wrong.
25 sq rt of 3 = 43.3
30 degrees = X 60 = X sq rt of 3. 90 degrees = 2x
Answer:
$428 for 4 concert tickets would equal $1,712
