Find the value of y if 2y +4=8​

Answer this question only if you know the answer! 30 points and

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Write the equations in logarithmic form 7^3=343