Multiply 7.77 x 10 to the 4th power. explain the shift of the digits.

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

1- 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. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?