Solution:
![x+1=0\\x=-1\\\\2x-4=0\\x=2\\\\\frac{5x^{2}+8x+2}{2x}=0\\x=\frac{-4+\sqrt[]{6}}{5}\\x=\frac{-4-\sqrt[]{6}}{5}](https://tex.z-dn.net/?f=x%2B1%3D0%5C%5Cx%3D-1%5C%5C%5C%5C2x-4%3D0%5C%5Cx%3D2%5C%5C%5C%5C%5Cfrac%7B5x%5E%7B2%7D%2B8x%2B2%7D%7B2x%7D%3D0%5C%5Cx%3D%5Cfrac%7B-4%2B%5Csqrt%5B%5D%7B6%7D%7D%7B5%7D%5C%5Cx%3D%5Cfrac%7B-4-%5Csqrt%5B%5D%7B6%7D%7D%7B5%7D)
Answer:
![x=-1\\x=2\\x=\frac{-4+\sqrt[]{6}}{5}\\x=\frac{-4-\sqrt[]{6}}{5}](https://tex.z-dn.net/?f=x%3D-1%5C%5Cx%3D2%5C%5Cx%3D%5Cfrac%7B-4%2B%5Csqrt%5B%5D%7B6%7D%7D%7B5%7D%5C%5Cx%3D%5Cfrac%7B-4-%5Csqrt%5B%5D%7B6%7D%7D%7B5%7D)
<em>Hope this was helpful.</em>
Answer: 81.85 km/hr
Converting m/sec into km/hr, 25 m/sec = 90 km/hr
Average =
Time = 50/90 = 5/9 hr
next 120 km at an average speed of 80km/h
=> Time = 120/80 = 3/2 hr
last part of its journey at an average speed of 90km/h in 35 Minutes
time = 35 minutes = 35/60 hr = 7/12 hr
Distance covered = 90 * 7 /12 = 105/2 km
Total Distance = 50 + 120 + 105/2 = 435/2 km
Total time = 5/9 + 3/2 + 7/12 = ( 20 + 54 + 21) /36 = 95/36
Average speed = (435/2)/(95 /36) = 432 * 18 /95 = 81.85 km/hr
Answer: 28/r+4
Step-by-step explanation: Divide each term by r + 4 and simplify
Answer:
t = 
Step-by-step explanation:
Given
D = M + Mrt ( subtract M from both sides )
D - M = Mrt ( divide both sides by Mr )
= t
