The short answer is: when their fractions add up to full integers.
For examples, two halves make up a whole, or

so the mixed numbers with those will add up to full integers:

but if they don't add up to an interger, the whole sum won't be an integer:
Answer:
h(x) = -x^2 - 1
Step-by-step explanation:
well y, h(x), f(x), n(x), or any other something of x is all the same thing y.
So if f(x) is -x^2 - 1,
Then h(x) is also -x^2 - 1
Answer:
dx. = yex ⇒ dy y. ∫. = x ... 2 xx dx. ∫. , i.e. yx = 4. 4 x c. +. Hence y = 3. 4 x c x.
Answer:
157 in(3)
Step-by-step explanation:
1. Crippled, Disabled
Crippled is almost sound like a discriminating word and have a negative connotation where as disabled is more polished and reverent.
2. Relaxed, Easy-going
Both seem same but relaxed refers to free, pleasure and stress free but easy-going implies not serious and laziness.
3. Knockout, Beautiful
Knockout mainly used to imply someone is sex y where as beautiful is simple compliment for a person.
4. Young, Immature
Sometimes both are used in the same context but youth may be always a substitute for immature.
5. Skinny, Thi n Both are almost similar but actually someone skinny is called thin.