Emanuel has 745 pictures in his phone.His memory is getting full so he starts deleting 20 pictures every day.Define each variabl
2 answers:
Answer:
Step-by-step explanation:
Let d represent number of days.
We have been given that Emanuel starts deleting 20 pictures every day. The number of pictures deleted in d days will be .
We have been given that Emanuel has 745 pictures in his phone. The number of pictures left after d days would be initial number of pictures minus number of pictures deleted in d days.
Therefore, the expression represents number of pictures left on Emanuel's phone after any given number of days.
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Answer:
The first option
Step-by-step explanation:
The domain of a rational function should be all real numbers except for when the denominator is equal to 0. To find when the denominator is equal to 0 you simply need to find the zeroes of the denominator... but in this case you can do that through factoring and using the quadratic equation.
So first step is going to be to factor out the GCF, which in this case is x. This gives you the equation. . So one of the zeroes is when x=0. Now to find the other two zeroes you can use the quadratic equation which is
. So to find the other zeroes you simply plug the values in. a=2, b=-1, c=-15