12. [0f0.25 Points] DETAILS PREVIOUS ANSWERS SCALES 4.2.022. Use the form of the definition of the integral given in the theorem to evaluate the integral. 5 /[X24x+6)dx 1 :1: Need Help? 1B. [0f0.25 Points] DETAILS PREVIOUS ANSWERS SCALES 4.2.037. Evaluate the integral by interpreting it in terms of areas. [jumpy -,. Need Help? | Built ll mun I 17. [0/0.25 Points] DETAILS PREVIOUS ANSWERS SCALC8 4.2.047.MI. b Write as a single integral in the form f( x) dx. a 2 3 -3 f ( x ) dx + f(x) dx f(x) dx -5 5 2 X f(x) dx -8 X Need Help? Read It Watch It Master It18. [-/0.25 Points] DETAILS SCALC8 4.2.049. 7 7 7 If f(x) dx = 33 and g(x) dx = 18, find [3f(x) + 4g(x)] dx. o Need Help? Read It Watch It