Given the directrix of y = −1 and focus of (0, 3), which is the equation of the parabola? y = one eighthx2 − 1 y = −one eighthx2 + 1 y = one eighthx2 + 1 y = −one eighthx2 − 1

Step-by-step explanation:

we know that

The standard form of a quadratic equation is

where

(h,k) is the vertex

(h, k+p) is the focus

y=k-p is the directrix

we have

focus (0,3)

so

> equation A

directrix y=-1

so

---> equation B

Adds equation A and equation B

Find the value of p

substitute the values in the equation

therefore

y = one eighthx2 + 1

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

we'll this would mean that the dunk tank and the bounce house are the same for 20 hours because the 2 represents that the two activities, and the 20 represents the amount of hours they both are. so with this said, it means that the answer is c. the costs for a dunk tank and bounce house are the same for 20 hours.

c.the costs for a dunk tank and bounce house are the same for 20 hours.

hope this .