X = 27
Explanation:
x = y times 3
For x values 1 unit either side of the vertex, the value of y is 2 more than it is at the vertex.
a = 2
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More formally, The graph appears to go through the point (4, 1). Substituting these values for (x, y) in the equation, we get
1 = a(4-3)² -1 . . . . substitute for x and y
2 = a . . . . . . . . . . add 1 and simplify
Answer: 
Step-by-step explanation:
Step 1) Add 4 to both sides: 
Had to do this since it’s kinda hard to type it out
Answer:
0.7999989281
Step-by-step explanation:
x1 = cos^-1 (3/5)
x1= 53.13°
sin(53.13) = 0.7999989281
