Which function represents exponential decay?
f(x) = 1/5(3/2)x
f(x) = 1/5(-3/2)x
f(x) = 4(-2/3)x
f(x) = 4(2/3)x

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

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.