in a class of 35 students 26 play football and play 20 long tennis, if 17 play above, many play neither.
1 answer:
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- First question:
Recall that and
for all
. So
For , we expect both
and
(i.e. the sine and cosine of any angle that lies in the first quadrant must be positive). By definition of absolute value,
if
.
So we have
making H the answer.
- Second question:
C is always true, because the inequality reduces to x > y.
Answer:
A. E={ and
is a multiple of 8}
Step-by-step explanation:
Let represent the set of natural numbers. Then we can write;
.
The set of all natural numbers that are multiples of 8 is then written as;
and
is a multiple of 8.
E is the set of natural numbers that are multiples of 8 can then be written in set builder notation as;
E={ and
is a multiple of 8}
The correct choice is A
Answer:
8/3
Step-by-step explanation: