Answer:
45
Step-by-step explanation:
The sum of angle in a straight line is 180
=> 3n + (4n - 15) + 90 = 180
3n + 4n + 75 = 180
7n = 180 - 75 = 105
n = 15
Angle ZLQK = 4n - 15 = 4*15 - 15 = 60 - 15 = 45
Answer:
<em>Scott will take 221 minutes to run 52 km</em>
Step-by-step explanation:
<u>Speed</u>
The speed of an object can be calculated with the formula:
![\displaystyle v=\frac{d}{t}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20v%3D%5Cfrac%7Bd%7D%7Bt%7D)
Where d is the distance traveled and t is the time taken.
Scott can run d=20 km in 85 minutes. Thus, his speed is:
![\displaystyle v=\frac{20}{85}\ km/min](https://tex.z-dn.net/?f=%5Cdisplaystyle%20v%3D%5Cfrac%7B20%7D%7B85%7D%5C%20km%2Fmin)
Now he wants to know how many minutes it will take him to run d=52 km. Solving the formula for t:
![\displaystyle t=\frac{d}{v}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Cfrac%7Bd%7D%7Bv%7D)
Since the speed has been already determined:
![\displaystyle t=\frac{52}{\frac{20}{85}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Cfrac%7B52%7D%7B%5Cfrac%7B20%7D%7B85%7D%7D)
Multiplying by the reciprocal of the denominator:
![\displaystyle t=52*\frac{85}{20}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D52%2A%5Cfrac%7B85%7D%7B20%7D)
t = 221 min
Scott will take 221 minutes to run 52 km
Answer: All sides are 5cm hope this helps...
The answer would be 3 hope this helps you