Answer:The pictures not that clear
Step-by-step explanation:
I think the last two are correct.
Hope it helps
You times 4 by everything inside the parentheses, so the answer would be as follows. 16a + 20b - 12
Use pythagorena theorme
D=

NOTE: x1 and x2 means the first x and second x, not x^1 and x^2
points given are
(1,1)
(5,6)
x1=1
y1=1
x2=5
y2=6
D=

D=

D=

D=

6.403
answer is B