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Sliva [168]
3 years ago
9

What is the solution of the equation of the compound inequality 4x <-8 or 9x> 18

Mathematics
1 answer:
sergey [27]3 years ago
7 0

Answer:

x<-2 or x >2

Step-by-step explanation:

4x <-8 or 9x> 18

Solve them seperately

4x <-8

Divide by 4

4x/4 <-8/4

x<-2

9x> 18

Divide by 9

9x/9 >18/9

x >2

x<-2 or x >2

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If x = # of quarters, then, the # of dimes will be equal to 2x. The total value (z) would be equal to:

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Then, since you switch the quarters and the dimes, and you have a new total, the resulting equation will be:

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Plug in the values you know:

1.2 + (0.25x + 0.10(2x)) = 0.25(2x) + 0.10(x)

Solve for x:

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This means that there are 8 Quarters in her bag right now. So, the amount of dimes is just 2x which is 16. So your answer will be:

She has 8 Quarters and 16 Dimes in her bag right now. Or, $3.60.

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