Answer:
40 two-digit numbers have one odd digit and one even digit in them.
Answer:
Where a and b are whole numbers. π is an irrational number when it is added to 0.4 we will get an irrational number . π+0.4=3.5415... The division is not coming to end and so we ger an irrational number.
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From the law of sines, we have

where
is the leg we're interested in,
is the hypothenuse,
is the angle opposite to
, and
is the angle between
and
.
So, in the first case, we can use

And in the second excercise, we use

The answer would be y=-4 and x=4, so pick which ever number/letter has this answer.