You have to distribute the minus sign to the second parenthesis, changing the sign of every term:

Answer:
D.
Step-by-step explanation:
Since both the triangles as kept separately are similar, so we'll take proptionality of their sides to find one side
MP/ML=MN/MK
20/28=35/MK
CROSS MULTIPLYING
20×MK=28×35
MK=980/20
MK=49
Answer:
B
Step-by-step explanation:
it adds up to 185
check the picture below.
so it has a base of 18x18 and a height of that much.

Answer:
C = (2, 6)
Step-by-step explanation:
The coordinates of point C can be found as the weighted average of the endpoint coordinates. The weights are the reverse of the relative segment lengths.
For AC : CB = 3 : 1, we have ...
C = (A +3B)/(1+3) = ((-1, 0) +3(3, 8))/4 = (-1+9, 0+24)/4
C = (2, 6)