In order for the whole expression to be negative, either (x⁵)
or (y⁴) or (z²) must be negative.
But an even-numbered power can't be negative ... even if the base
is a negative number, any even-numbered power of it is positive.
So (y⁴) and (z²) are always positive. The expression can be
negative if 'x' is negative, because (x⁵) will then be negative.
None of the proposed requirements is appropriate, so the
final answer is E. None .
Answer:
here
Step-by-step explanation:
if all you're doing is distributing it, the answer is -6d + 3
Answer:
there is a strong negative correlation between data so the chosen model is a good fit
Step-by-step explanation:
a correlation coefficient close to -1 means that the model is considered a good fit; if correlation is greater than 0.8 then it's described as strong
Answer:
P(n,4)÷P(n,2)
= (n-2)(n-3)
20 = 4 × 5 (two consecutive numbers)
(n-2)(n-3)=5×4
n-2=5
n=7