Write the equation of a parabola with vertex (2,-1) and directrix y=-3

Step-by-step explanation:

a parabola is the graph of a quadratic equation, so the general equation is

If the directrix is negative, it means the graph opens down, so a is -

and c is -3

this gives us

all we need now is what is b

b is the y intercept for

to find the y intercept, we plug in 0 for x

so the y intercept is -3

so the equation is

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

step-by-step explanation:

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