4 years ago

Find the value of this expression if x = -9. x2 + 3 x +6

Mathematics

1 answer:

iren [92.7K]4 years ago

7 0

Answer:

Step-by-step explanation:

x² + 3 = (-9)² + 3 { (-9)² = -9 *-9 = 81}

= 81 + 3

= 84

x + 6 = -9 + 6 = -3

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Kaylee and Olivia go to the movie theater and purchase refreshments for their friends.

KatRina [158]

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Step-by-step explanation:

Let,

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y represent the cost of a drink.

According to given statement;

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Subtracting Eqn 3 from Eqn 1

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Dividing both sides by 2

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4x+12y=30 and x+6y=11.25 can be used to find the price of one bag of popcorn and the price of one drink.

The price of one bag of popcorn is $3.75

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

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