Given than that x = 2, y = 3, z = -4. Answer the following question Create two expressions that are equivalent to the expression – 3z +y.
Hint: Evaluate – 3z + y and then create a new expression that simplifies to the same number.
Expression 1:
Expression 2:

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

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?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?