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My name is Ann [436]
3 years ago
7

Sharko had $294. After spending $24.20 on a plate of pasta, $5.05 on a slushie and giving $59.45 to his sister, he had twice as

much money as his sister. How much money did his sister have at first?
Mathematics
1 answer:
siniylev [52]3 years ago
3 0

Answer:

$43.20

Step-by-step explanation:

He had $294 at first then he spent $24.20 on a plate of pasta, $5.05 on a slushie and gave $59.45 to his sister

so the money left is

294 - 24.20 - 5.05 - 59.45 = 205.3 this is twice of what his sister has so the sister has 102.65

102.65 - 59.45 = 43.20 is the money ahe had at first

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aalyn [17]

The polynomial to be added to –7mn + 2m² + 3n² to obtain 5m² + 2mn - 9n² is: 3m² - 11n² + 9mn.

<h3>Addition of Polynomials</h3>

Like terms should be combined together when adding polynomials.

Let x represent the polynomial expression that would be added to –7mn + 2m² + 3n² to obtain 5m² + 2mn - 9n².

Therefore:

–7mn + 2m² + 3n² + x = 5m² + 2mn - 9n².

x = 5m² + 2mn - 9n² - (-7mn + 2m² + 3n²)

x = 5m² + 2mn - 9n² + 7mn - 2m² - 3n²

Combine like terms together.

x = 3m² - 11n² + 9mn

Therefore, the polynomial to be added to –7mn + 2m² + 3n² to obtain 5m² + 2mn - 9n² is: 3m² - 11n² + 9mn.

Learn more about polynomial on:

brainly.com/question/24662212

6 0
2 years ago
The cost to rent a rug-cleaning machine from the supermarket is $23 per day. The supermarket charges a check-out fee of $45 for
igomit [66]

Answer:

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Since it is $23 per day, that dollar amount must be associated with a variable that multiples it per day that it is rented. Finally, you need to add the one time $45. This equation can then be used to find how many days it was rented for.

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