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3 years ago

8

Karen is going to the state fair. If she can spend at most $50, which inequality can be used to solve for r, the number of rides

Karen can go on?

1 answer:

Eva8 [605]3 years ago

5 0

Okay so what you would do then is say that 2.25r must be less than or equal to 50.

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This can be solved using a system of equations.
$\left \{ {{x+y=80} \atop {x-4y=10} \right. 
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Subtract y from both sides.
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Substitute:
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Subtract 80 from both sides:
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Divide both sides by 5:
$y= \frac{70}{5} =14$
Substitute.
$x=80-14=66$

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