Question

i inserted a picture of the question, i can give you the answer to question 4 if it helps, all the question go together question 5,6 & 7

Answer 1

• x -intercept,: (0,0) and (60,0)

• Vertex: (30,45)

The roots of the quadratic expression are the x -values in which, in our case, y = 0.

Then:

• r1 = 0

,

• r2 = 60

We can substitute these values in the following equation:

`y=a(x-r_1)(x-r_2)`
`y=a(x-0_{})(x-60)`

Finally, we can substitute the vertex values in the equation to get a :

`45=a(30)(30-60)`
`45=a(30)(-30)`
`45=a(-90)`
`a=(45)/(-90)`
`a=-(1)/(2)`

Answer:

• 5. ,r1 = 0 and r2 = 60

,

• 6.

`y=a(x-0_{})(x-60)`
`a=-(1)/(2)`
`y=-(1)/(2)(x-0_{})(x-60)`

• 7.

`45=a(30)(30-60)`