Find the minimum or maximum value of the function. describe the domain and range of the function, and where the function is increasing and decreasing. h(x)=-(x)-3

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5

Can anyone me with this question?