Alg 1: 63 and 64 Elimination and Inverse Variation

35 Slides • 8 Questions

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Fill in the Blanks

Solve the system.

7x-4y=-3

-3x+4y=-1

Write your answer as an ordered pair. Use parentheses, no spaces.

Type answer...

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10

Fill in the Blanks

Solve the system. Write your answer as an ordered pair, with parentheses. Use no spaces.

11x+6y=21

11x+4y=25

Type answer...

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Fill in the Blanks

Solve the system. Write your answer as an ordered pair, with parentheses. Use no spaces.

-2x+5y=6

6x-2y=34

Type answer...

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Fill in the Blanks

Solve the system. Write your answer as an ordered pair, with parentheses. Use no spaces.

-8x-3y=26

-5x-2y=16

Type answer...

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Fill in the Blanks

A movie theater sells 540 tickets to a matinee showing of a new animated feature. A child matinee ticket costs $5.50 and an adult matinee ticket costs $6.00. If the movie theater made $3060 for that showing, how many adult tickets were sold?

Type answer...

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Multiple Choice

$4y=x$

1

direct variation

2

inverse variation

3

neither

30

Remember:

4y=x

\frac{4y}{4}=\frac{x}{4}

y=\frac{x}{4}

which is the same as

y=\frac{1}{4}x

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Multiple Choice

$3xy=9$

1

direct variation

2

inverse variation

3

neither

32

$3xy=9$

$\frac{3xy}{3x}=\frac{9}{3x}$ divide both sides by 3x
$y=\frac{9}{3x}$
$y=\frac{3}{x}$ inverse variation

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Fill in the Blanks

If y varies inversely as x, and y = 3.5 when x = 20, find x when y = 10.

Type answer...

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Alg 1: 63 and 64 Elimination and Inverse Variation

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