If all solutions of a trigonometric function are given by the general formula, theta equalsstartfraction pi over 4 endfractionplus2kpi or theta equalsstartfraction 11 pi over 4 endfractionplus2kpi, where k is any integer, then which of the following is not a solution of the equation

The sum of two numbers is 86, and their difference is 20. find the two numbers

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?

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)