Let U be the universal set, where U=(1,2,3,4,5,6,7,8,9)let sets A and B. be subsets of U, whereA=(2,3,8,9) and B=(1,2,3,5)
Black_prince [1.1K]
(A U B) = {1, 2, 3, 5, 8, 9}
(A U B)^c = {4, 6, 7}
A^c = {1, 4, 5, 6, 7 }
B^c = {4, 6, 7, 8, 9}
A^c ∩ B^c = {4, 6, 7}
8 + 3(4 + 5)
8 + 3(9)
8 + 27 = 35
For the
national mobile, you have 300 texts for 9.99 dollars whereas for airtime, you
have 500 texts for 17.99 dollars.
9.99
dollars/300 texts = 0.0333 dollars per text
17.99
dollars/500 texts = 0.036 dollars per text
Choose the
cost which has the lowest rate. If you really like to travel to other places
and you need to budget, you will choose the national mobile rate. It is cheaper
and 300 texts is a lot. However, if you want to travel including using your
mobile texts during air transportation, you need to buy the 17.99 dollars. It’s
a bit expensive but the number of texts is a lot. Divide the cost by the number
of texts. For costing purposes, its smarter to choose the national mobile rate.
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Answer:
The Answer and explanation with steps in the following attachment
Step-by-step explanation:
Answer:
similarity
Step-by-step explanation:
look , dude
the two triangles have the following features:
the angle B= angle C = 90 degree
the angle A= the angle F
so the third angle in the first triangle = the third angle in the second triangle
so you have one condition of similarity which is the three angles are equal
to get the answer for lengths :
ab/fe= constant of proportionality
thus ab/fe=2.5/5=.5
so ac/13=.5 thus ac=6.5
and 6/de=.5 so de=12
