Is a + b rational or irrational

Mathematics

1 answer:

Crank2 years ago

6 0

Answer and fdaStep-by-step explanation:::

The answer depends on the numbers that are inputted for a and b.

If the numbers that are inputted for both a and b are rational, then a + b would be rational.

If the numbers that are inputted for both a and b are irrational, then a + b would be irrational.

If one of the variables is rational and the other is irrational, then a + b would be irrational.

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Yes, Bobby will have enough money if he saves for 9 weeks. You can find this through either substituting w for 9 in the equation, or solving the equation itself.

Substituting:

$25(9)+30$
Substitute w for 9.

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255 is greater than 250, so yes, he will have enough money saved.

Solving the equation:

$25w+30=250$
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Subtract 30 from both sides.

$w=8.8$
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The number of weeks he needs is 8.8. When rounding it up, you get 9.

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Step-by-step explanation: