Which number will make the two fractions equivalent 2/3 ?/21

Find dy/dx using implicit differentiation ln(20+e^xy)=y

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.

Find the least common denominator for thesetvo rational expressions.n^2/n^2+4n+4 -3/n^2+7n+10