Y=-3x+1
1 raises the y intercept and -3 is the slope that we can see from (0,1) to (1,-2)
So this is not too hard, as with any math problem we write what we know.
Starting speed: 80km/h
Time from P to Q: 2.5h
Increase in speed: 20km/h (25% is dividing by 4)
Distance from Q to R: 150 kilometers
So let's find the speed and distance for both legs of the trip.
Speed for P to Q: 80km/h
Distance from PtoQ: 200km (2.5h * 80km/h)
Speed from Q to R: 100km/h (80 +20)
Distance from QtoR: 150km.
Now we multiply the speeds by their respective distances add them and then divide by the total distance.
((80 *200) + (100 * 150))/350 = ~88.57143
It would be 1.66 because you divide 15 by 9
Answer:
B
Step-by-step explanation:
When you see point A, you also notice the angle is kind of sometype of right triangle. There is a hypotenuse and an adjacent to the angle in that right triangle. What has hypotenuse and adjacent in its equation? Cos! Cos = Adjacent/Hypotenuse. We have to take the cos of the angle! which makes it option B..
