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konstantin123 [22]
2 years ago
14

The vertex of this parabola is at -5, -2. when the x-value is 4, the y-value is 2. What is the coefficient of the squared expres

sion in the parabola's equation
Mathematics
2 answers:
tatuchka [14]2 years ago
6 0

Answer:

4/81 = a

Step-by-step explanation:

The vertex form of a parabola is

y = a (x-h)^2 +k  where (h,k) is the is the vertex

y = a (x- -5)^2 -2

y = a (x+5)^2 -2

Substituting the point into the equation

2 = a( 4+5)^2 -2

2 = a( 9)^2 -2

2 = a (81) -2

Add 2 to each side

4 = 81 a

Divide each side by 81

4/81 = a

AlekseyPX2 years ago
3 0

Answer:

a=4/81

Step-by-step explanation:

Hopefully this helps :)

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