I'm desperate. i need all of them answered

a. A' means the complement with respect to Z? If so, then

To know A' you need to write all the elements in Z that are not in A.

b. All the subsets of B, is knowed as P(B),

c. (Add to A the elements of B, or equivalently add to B the elements of A)

d.  express informally speaking the elements that have in common, but there is no element in common, so

or

46

step-by-step explanation:

given

height = 168 cm

formula

height =2.47*f+54.13

solution

168 = 2.47f + 54.13             subtract 54.13 from both sides

168 - 54.13   = 2.47f             combine

113.87 = 2.47f                     divide by 2.47

113.87 / 2.47 = f                   combine

46.1 = f  

answer: 46 cm