2(t + 5) > 4t - 7(t + 3)
2t + 10 > 4t - 7t - 21
2t + 10 > -3t - 21
2t + 3t > -21 - 10
5t > -31
t > -31/5
For this case, you must use the given expression, taking into account that:
n = number of days.
We have then that for day 21, n = 21.
Substituting we have:
a21 = 100 + (21-1) * 4
a21 = 180
Answer:
she sprints 180 yards on day 21
So, I think that you mean that
n²+m² is even? (the "plus" sign is missing, but I think this is correct).
this can only happen if either:
both n and m are even
or
both n and m are odd
That's because a sum of two expressions is even if either both or none of the expressions summed is even, and a power of a number is even only if the number is even too.
are those some of the options?
yes!
<span>n and m are even,- possible!
n and m are odd, -possible!
n+m is even, - possible; it would be the case i</span><span>f either both n and m are even or both n and m are odd n+m is odd,
so the option we'll choose is:
none of these are impossible </span><span />
