Tonya has a small picture with a length of inches. she wants to enlarge the picture by a factor of 7 and frame it. which of the following is true?
a.
the enlarged picture has a length of 28 4/5 inches.

b.
the enlarged picture has a length of 6 1/5 inches.

c.
the enlarged picture has a length of 18 1/7 inches.

d.
the enlarged picture has a length of 33 2/5 inches.

i can

step-by-step explanation:

question

what is the value of the third quartile of the data set represented by this box plot? a. 19 b. 21 c. 26 d. 29

answer

c

my dear correct answer is option number 3

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