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RUDIKE [14]
3 years ago
6

Need help asap plz help dont have many points but ill give yu all i have if u help

Mathematics
1 answer:
Anna71 [15]3 years ago
4 0
Hello!

We can go through the choices and see if they are true

Choice 1
A function has one output for every input

This is not a function because it has -1 as an output for both 4 and -1

This is the answer
------------------------------------------------------------------------------------------------------
Choice 2
The inputs are the x's

We see that the inputs are -1, 0, 3, and 4

This is true
------------------------------------------------------------------------------------------------------
Choice 3
The outputs are the y's

We see the outputs are -2, -1, and 1

This is true
------------------------------------------------------------------------------------------------------
Choice 4
We can follow the lines and see the relations are

(-1, 1), (0, -2), (3, 1), (4, -1)

This is also true
------------------------------------------------------------------------------------------------------
The only one that was false was the first choice so that is the answer

The answer is A) The diagram represents a function
------------------------------------------------------------------------------------------------------
Hope this helps!
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To find the time Jack takes to cross Swan Lake, his average speed is required:

The time it will take Jack to cross Swam Lake is <u>0.5 hours</u>

Reason:

Time it took Jack to paddle 6.4 km upstream, t = 2 hours

Distance Jack paddled, d = 6.4 km

The given speed of the Black River, <em>v₂</em> = 1.8 km/h

The width of the lake, w = 2.5 km

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Let <em>v₁</em>, represents Jack's speed, we have;

v_1 - v_2 = \dfrac{d}{t}

Therefore;

v_1 - 1.8 = \dfrac{6.4}{2} = 3.2

v₁ = 3.2 + 1.8 = 5

  • Jack's speed, v₁ = 5 km/h

Time \ to \ cross \  the \ lake , \ t_S = \dfrac{w}{v_1}

t_S = \dfrac{2.5 \, km}{5 \, km/h}  = 0.5 \, hr.

The time it will take Jack to cross Swan Lake, t_S = <u>0.5 hours</u>

Learn more here:

brainly.com/question/17168275

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Answer:

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Step-by-step explanation:

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x = \sqrt{625} = 25

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