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3 years ago

The regular price of a soccer ball is $28 and it is on sale for 25% off. What is the sale price of the soccer ball.

Mathematics

2 answers:

Ilia_Sergeevich [38]3 years ago

5 0

Hmhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

dimulka [17.4K]3 years ago

5 0

Answer:

$21

Explaination:

discount = 28*25/100

discount = $7

so sale.prixe = 28-7

$21

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alexdok [17]

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Part 2) Is a consistent independent system

Part 3) Is a consistent dependent system

see the attached figure

Step-by-step explanation:

we know that

If a system has at least one solution, it is said to be consistent .

If a consistent system has exactly one solution, it is independent .

If a consistent system has an infinite number of solutions, it is dependent

If a system not have solution, it is said to be inconsistent

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The system has no solution

therefore

Is a inconsistent system

Part 2) we have

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we know that

If two lines have different slopes, then the lines intersect at one point and the system of equations has one solution

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The lines intersect at one point

The system has one solution

therefore

Is a consistent independent system

Part 3) we have

$3x+y=4$ ----> equation A

$-6x-2y=-8$ ----> equation B

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$-6x-2y=-8$ ----> equation C

Compare equation B and equation C

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The system has infinity solutions

therefore

Is a consistent dependent system

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