Isaac had a significant term paper due the next day and was ready to print it out when he noticed he had no paper in his printer. He went online and found an office supply store four miles away with a case of 88 brightness paper that was 24#. The case consisted of 10 packages, or 500-sheet reams, of paper for was for general use, 84 brightness, and only 20#.

1. How much is the cost of one ream in each location?

if i put something wrong your not gonna like it so rather not say nothing.

the answer is 15.50 for one mile

b) is slope: 0   y- intercept 15.5

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81