5. U = {x€N | 16 A = {multiples of 7} B = {factors of 56} C = {even numbers > 22} i) List the members of each
1 answer:
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Answer:
.
Step-by-step explanation:
We are given that and
(because that's the ground), so substituting that into
gives
.
Answer:
(C) 220
Step-by-step explanation:
Let x represent the number of adult tickets sold and y represent the number of student tickets sold. With the information given, we can set up two equations:
(Since for every adult ticket sold, $5 is made and for every student ticket sold, $3 is made)
In the first equation, we can represent x in terms of y:
And then, we can substitute x in the second equation for 360 - y to get:
which simplifies to:
and therefore,
.
Hope this helps :)