Please Help Simplify
12x+3 all over (divide) 36x^2-42x

Please show all your work!!

Which representation has a constant of variation of -2.5

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?