Given the directrix of y= -1 and focus of (0,3) which is the equation of the parabola
A) y=1/8x^2-1
B) y=-1/8x^2+1
C) y=1/8x^2+1
D) y=-1/8x^2-1

step-by-step explanation:

y=mx+b

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

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