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3 years ago

The relation {(-1, 4), (2, 7), (3, 7)} is a function.

1 answer:

4 0

It is a function because the X does not repeat. If the X repeat then it is not function for example.
(2,4), (5,6), (2,8) if it repeat like this then it is not function

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A soccer field has a perimeter of 326 metres. Its area is 6370 square metres. What are the dimensions of the field?

Burka [1]

Answer:

Step-by-step explanation:

chiều dài:x,x>0

chiều rộ:y

$\left \{ {({x+y)*2=326} \atop {xy=6370}} \right.$

$\left \{ {{x+y=163} \atop {xy=6370}} \right.$

$\left \{ {{y=163-x} \atop {xy=6370}} \right.$

$\left \{ {{y=163-x} \atop {x*(163-x)=6370}} \right.$

$\left \{ {{y=163-x} \atop {163x-x^{2} =6370}} \right. \\$

$\left \{ {{y=163-x} \atop {x_{1} =98; x_{2} =65}} \right.$

$\left \{ {{y=65} \atop {x=98}} \right.$

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

A new robotic toy was selling for $24 before it become very popular. The store raised the price by 25%. What was the cost of the

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$30

Step-by-step explanation:

So we know that the toy cost 24 dollars. We also know that the cost is increased by 25%.

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3 years ago

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Step-by-step explanation:

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