The vertex is at (4, -49) and the axis of symmetry is at x= 4.
To find the vertex of this equation, use this method:

a=2
b=-16
This will help get your x value and the axis of symmetry. To find the y value of the vertex, insert the x value, 4 to get your y value, -49.
Answer:
<h2><em><u>ᎪꪀsωꫀᏒ</u></em></h2>
➪-263
Step-by-step explanation:
-3x²-20
-3(-9)²-20
-3(81)-20
-243-20
-263
15/60 simplified is 1/4
1/4 is not equal to 3/4
Answer:
17.5
Step-by-step explanation:
Given that the variables x and y have a proportional relationship.
i.e. y is directly proportional to x or can be written as
y = mx where m is the constant of proportionality.
When x =2, y =7
Substitute this to get the value of m.
7 =2m or m = 3.5
Thus the relationship between x and y is
y = 3.5x
So when x=5, y = 3.5(5) = 17.5