Question

Apply elimination method
For 7x-y=42 and 3x-y=-6​

Answer 1

Step-by-step explanation:

ANSWER

A polynomial is an algebraic expression containing two or more terms.

Also, it requires the exponents of the variables in each term should be positive integers.

A,  B,  D do not satisfy this property

Hence, C is correct.

Answer 2

Answer:

see the pic ....there is your answer