If a3 = 11 and a5 = 7 and ak is the -th term of the sequence and ak = -9, then what is the value of k?

Need this asap if anyone can i would be very grateful. if you could show workings that would really

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Which line is parallel to the line that passes through the points (2, –5) and (–4, 1) a. y=-x+5 b. y=-2/3x+3 c. y=2/3x-2 d. y=x+5