Biology, 09.07.2019 17:30 batman48000

The school hockey team travelled 150 km to a tournament by bus. the bus drove at 90 km/h for most of the way, but was delayed by a storm, when its speed was only 30 km/h. if the trip took 3 hours, how far did the bus travel in the storm

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Answer from: Jcausey4477

The bus traveled 1 hour at 90 km/h and 2 hours in the storm at 30 km/h

Explanation:

From the example, let us recall the following statements

The school hockey team traveled 150 km to a tournament by bus.

The bus drove = 90 km/h for most of the way

The speed was only 30 km/h. when delayed by a storm

Now, lets find how far the bus travel in the storm

Given that

90x + 30y = 150

x+ y = 3

30x + 30y = 90

-(90x + 30y = 150)

-60x + 0 = -60

so,

x = 1

x + y = 3

1 + y = 3

y = 2

Therefore, they travelled 1 hour at 90km/h and 2 hours in the storm at 30km/h

Answer from: Quest

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports the evolution of earth due to chemical weathering.

hope it !

Answer from: Quest

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

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