Here are the answers to each of your questions:
Question 6
Sarah's expression for her purchase of balloons and cupcakes is given as \(2b + 2\).
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If she buys 6 balloons, we substitute \(b\) with 6:
\[ 2(6) + 2 = 12 + 2 = 14 \]
So, she will spend $14.00.
Response: $14.00
Question 7
We need to simplify the expression \(3(16 + 5x)\).
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Distributing the 3, we have:
\[ 3(16) + 3(5x) = 48 + 15x \]
So, the simplified expression is 48 + 15x.
Response: 48 + 15x
Question 8
The definition of the math term "variable" is:
- A letter that represents an unknown number.
Response: A letter that represents an unknown number
Question 9
To solve the expression \(25w + 100\) where \(w = -4\):
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Substitute -4 for \(w\):
\[ 25(-4) + 100 = -100 + 100 = 0 \]
So, the answer is 0.
Response: 0
Question 10
We need to combine the like terms in \(3a - 2b + 4 + 6b + 7a\).
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Combine \(3a + 7a\) and \(-2b + 6b\):
\[ (3a + 7a) + (-2b + 6b) + 4 = 10a + 4b + 4 \]
Thus, the combined result is 10a + 4b + 4.
No response matches exactly, so the likely intent is: 10a + 4b + 4 (though it seems there's an error in the given options).
If we take a closer look at the options provided, none of them directly matches what you would expect from combining the terms correctly. Please review the options to ensure correctness.
Let me know if you have any further questions!