14. 3 (a-2) -4 (29-3)= 15. 3 (x+2y) -2 (2x-y)
16. 3 (2c+d) -3 (3c-20)
17. 4 (a+3b+7) +2 (a-2b-1)

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3