Answer:
1. Option B, i.e., 4
2. Option C, i.e., 5b
3. Option B, i.e.,
4. Option A, i.e,
5. Option C, i.e., y - x + z
Step-by-step explanation:
1.
The given expression is
We need to find the number of terms in the given expression.
Here, the terms are 2x, -5y, 3 and x.
Therefore, the number of terms is 4. Option B is correct.
2.
If two or more terms have same variable of same degree, then they are called like terms.
3a, a and -2a are like terms but 5b is not a like term.
Therefore, 5b cannot be combined with the others. The correct option is C.
3.
Similarly,
-3x, x and 11x are like terms but is not a like term because the degree of x is 2.
Therefore, cannot be combined with the others. The correct option is B.
4.
The given expressions are
It can be rewritten as
It means expression 4x+3x, (4+3)x and 7x are equivalent.
Therefore, All of the following are equivalent except . Option A is correct.
5.
The given expression is
x - y + z
It can be rewritten as
x + z - y
z + x - y
z - y + x
All of the following are equivalent except y - x + z. Therefore, option C is correct.