Answer:
45 km/hr
Explanation:
total distance = 90
Increased speed = x+15
90/x - 90/x+15=1/2
90(1/x - 1/x+15)=1/2
90(x+15-x/x^2+15x)=1/2
equation is:
x^2+15x-2700=0
x^2+60x-45x-2700=0
x(x+60)-45(x+60)=0
(x+60)(x-45)=0
x= -60, x=45
reject the negative value = -60
usual speed=45 km/ hr
I don’t know why it was so successful at that
Draft
Maybe Share
Revise
Edit
Final
Publish
Revise
Final
For my school it’s really only draft, revise/edit, maybe share then publish
Neither Tech A nor Tech B is correct.
- Fuels must not be used to clean break components because they are combustible.
- Tetrachloroethylene, an industrial solvent beneficial to degrease metal components, is used in commercial fluids for that purpose.
- Tetrachloroethylene is frequently utilized by the service departments of large dealerships and is available in a spray presentation that is non-flammable and quick drying.
<h3>What is gasoline?</h3>
- Petroleum-derived clear flammable liquid known as gasoline or petrol is the main fuel for the majority of spark-ignited internal combustion engines.
- It mostly comprises of organic compounds made from petroleum fractional distillation that have been improved with various additions.
Learn more about fuels here:
brainly.com/question/981208
#SPJ4
