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
The experiment as more enjoyable than participants in the other two groups
I think it’s because- it decreases the volume of runoff and improves water quality by infiltrating, filtering, storing and evaporating stormwater. If that’s what you’re asking
Answer:
B. You could not use any of the information because the site appears to be a joke.
Explanation:
Before writing an article, every writers need to first determine the purpose of the articles. If the articles are made to give historical explanation / to provide information, then all the online sources that can be included need to come from a credible website that cited the works of experts that dedicate their time to study their field.
The existence of photograph of people in Halloween costumes indicates that the site was made for entertainment purposes. This made every content in the site became unreliable for formal articles.
Answer:
Electromagnetic waves are created by a charged particle that generates an electric field. The electric field creates a magnetic field. As the charged particle moves the electric field and magnetic field keep changing, which causes the wave to move.
Explanation:
Let me know if it helps
