The acidity of the water in a swimming pool is considered normal if the average of three ph readings is between 7.2 and 7.8, inclusive. the first two readings for a swimming pool are 7.4 and 7.9. what possible values for the third reading p will make the average ph normal?

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

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dont know

step-by-step explanation:

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this

i have no