Derive the equation of the parabola with a focus at (2, −1) and a directrix of y = −one half. (urgent {25 points})

a f(x) = −(x + 2)2 − three fourths
b f(x) = (x + 2)2 + three fourths
c f(x) = −(x − 2)2 + three fourths
d f(x) = −(x − 2)2 − three fourths

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

salary

step-by-step explanation:

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.