Answer:

Step-by-step explanation:
Given

See attachment
Required
Determine the measure of 
and
are on a straight line.
So:
--- angle on a straight line
Substitute known values

Collect like terms


Answer:
I think it is 10 km/hr
Step-by-step explanation:
5 hrs = 40 more with 2 km/hr current
2 hrs= less 40 no current
40-2x5=30
30 without current for three hours
30/3=10 km/hr no current
CHECK
10x2=20
10x5=50+2x5=60
Answer:
C
Step-by-step explanation:
There are three turning points.
The local minimums are (-1,-5) and (1, -5)
The local maximum is (0,-4)
The word is B_SA _B I don’t know the rest
Well the simple answer would be 96 the surface of 96 cm