Like every quadratic equation

where 

we can factor out 

And find the two solutions

In this case, the solutions are

If you know that
are the solutions to the quadratic equation

then you can factor the poynomial as

So, in this case, you have

The average is found by adding all the temperatures together, then dividing by the number of days.
Since the average for five days was 63, then the total of the temperatures need to equal 63 x 5 = 315.
The total for the first four days was : 56 + 60 + 79 + 70 = 265
The fifth day is 315 - 265 = 50 degrees.
Quadrant 2
The last answer choice
D.The puppy gains approximately 0.25 pound each week.
<u>x = no. of weeks</u> in f(x) = 0.25x + 1.2
Multiple 14.6 x 6.5 then multiply the answer to that by 6.5