What is the vertex of the graph of this function

y= -(x-1)(x+3)

Vertex = (-1,4).

Step-by-step explanation:

Given equation is .

Now we need to find the vertex of the graph of given function .

To find that we can rewrite given function into vertex form

Now compar this equation with

we get: h=-1, k=4

Hence vertex is (h,k) or (-1,4).

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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