Answer:
t=4h
Steps below
Step-by-step explanation:
We know:
speed of boat with respect to earth: 13 km
speed of stream with respect to earth: 4 km
13 km/h + 4 km/h = 17 km/h The time to travel 68 km with this speed is thus t = 68 km 17 km h = 4 h
<em><u>Hope this helps.</u></em>
80% of quizzes + 20% of final = final grade
80% * 73 + 20% * x = 70
0.8 * 73 + 0.2x = 70
58.4 + 0.2x = 70
0.2x = 11.6
x = 58
<u>Given</u>:
The coordinates of the points A, B and C are (3,4), (4,3) and (2,1)
The points are rotated 90° about the origin.
We need to determine the coordinates of the point C'.
<u>Coordinates of the point C':</u>
The general rule to rotate the point 90° about the origin is given by
![(x, y) \Rightarrow(-y, x)](https://tex.z-dn.net/?f=%28x%2C%20y%29%20%5CRightarrow%28-y%2C%20x%29)
Substituting the coordinates of the point C in the above formula, we get;
![(2, 1) \Rightarrow(-1, 2)](https://tex.z-dn.net/?f=%282%2C%201%29%20%5CRightarrow%28-1%2C%202%29)
Therefore, the coordinates of the point C' is (-1,2)
The answer is 132° because there angle CDE is 87° so you know it's more of that. And, 264° is way too wide.
I guess it f(2) I’m not sure