Answer:
B
Step-by-step explanation:
To solve this, we use ratio.
Firstly, we need to know the number of hours traveled. The total number of hours traveled = x+y
Ratio of this used by high speed train = x/(x +y).
Total distance traveled before they meet = [x/(x + y)] × z
For low speed train = [y/(x + y)] × z.
The difference would be distance by high speed train - distance by low speed train.
= z [ (x - y)/x + y)]
Answer:
Step-by-step explanation:
Pollution can be defined as the introduction of harmful substances (man-made or natural) into the environment.
There are four major types of pollution:
1. Land pollution
2. Water pollution
3. Air pollution
4. Noise pollution
Land pollution refers to the gradual disintegration of the earth surface.
Causes of land pollution
1. Deforestation: The continuous cutting down of trees in the forest.
2. Erosion: The gradual disintegration of soil caused by the action of water.
3. Harmful agricultural practices such as bush burning, introducing toxic substances such as pesticides into the soil
4. Increased industrial waste due to increase in the number of industries
5. Mining of natural resources from the earth surface
6. Construction of bridges, railways and roads
Solve with one variable for both sides.
To get $90 dollars you multiply $15 • 6. So you would multiply $6 • $6
Answer: $36
If the price of the item drops by 60% then that means the new price is 40% of the original
new price = p*0.4
ex:
new price = $100*0.4= $40
new price= $75*0.4 = $30
