What are the values of the trigonometric ratios for this triangle?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!