it's a test

10. Given / (x) = x2 + 2x - H and g (x) = x - 2, determine the equation of (g + /)(x) in simplified form. 11. Determine two functions, f (x) and g(x), such that h(x) = /[g(x)) when h(x) = v2 sin(x(x - 2.25)) [A2) 12. Ify = 2x + 5, x = v3t - 1, and & = 3k -5, express y as a function of k. [T2] 13. The temperature of the Earth's crust is given by the function 7(d) = 0.01d + 20, where d is the depth below the Earth's surface, in metres, and 7 is the temperature in degrees Celsius. A mining elevator's rate of descent is given by the function d = 5V2t, where ? is time in seconds. a) Write a simplified function that represents the temperature as a function of time: 7(t). [T1] b) State the domain and range of the function from part a) that is relevant to the problem. [72]