What is the equation of the quadratic graph with a focus of (8, −8) and a directrix of y = −6? a) f(x) = −one fourth (x − 7)2 + 1 b) f(x) = −one fourth (x − 8)2 c) f(x) = −one fourth (x − 8)2 − 7 d) f(x) = one fourth (x − 7)2

Step-by-step explanation:

we are given a quadratic equation

we know that quadratic equation is same as equation of parabola

so, we can use formula

Focus is

now, we can compare it with given focus

=(8,-8)

we get

Directrix is

we are given directrix =-6

we got two equations as

now, we can add both equations

and we get

now, we can find 'a'

now, we can plug back all values

and we get

So, equation of parabola is

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98