Answer:
y=42
Step-by-step explanation:
y+48+90=180
y=180-138
y=42
Use the given recursion and starting value of
to find
:

Do the same for
and
:


(That's not a mistake. This just tells you that the 2nd and 3rd iterates are very close together and have at least the same first 5 digits after the decimal.)
Answer:
8) scale factor: 3
angles Q & L, S & N, r & M
sides 10 x 3 = 30, 6 x 3 = 18, 13 x 3 = 39
9) scale factor: 0.4
angles B & F, C & G, D & H, A & E
sides 9 x 0.4 = 3.6, 7.5 x 0.4 = 3, 10 x 0.4 = 4, 12 x 0.4 = 4.8
The general equation of a line is:

When m is the gradient and x1 and y1 are the coordinates of the points on the line
Therefore:

