Find the greatest number of 5 digit which when divided by 25, 30 and 40 leaves reminder of 20, 25 and 35 respectively

Which equation can be simplified to find the inverse of y = 2x2?

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

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.