PLEASE HELP! Show an informal and a formal proof to show that the following conjecture is true.

Conjecture: The sum of an odd number and an even number is an odd number.

Can any one me with the answers to these questions asap?

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Astudent has created the give circuit diagram. it consists of a battery, a resistor, and a light bulb. in one minute, 1.2c of charge flows through the resistor. how much charge flows through the light bulb in one minute?