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Leila is buying a dinosaur model. The price of the model is xxx dollars, and she also has to pay a 7\%7%7, percent tax.
2 answers:
Answer:
1.07x
Step-by-step explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one.
<em>Leila is buying a dinosaur model. The price of the model is x dollars, and she also has to pay a 7%, percent tax. </em>
<em>Which of the following expressions could represent how much Leila pays in total for the model?</em>
My answer:
Given the information:
The original price of the model: x
Taxed Amount = 7% of x
<=> That is, 7% in decimal multiplied with "x"
<=> = 0.07x
=> Total amount Leila needs to pay is:
= The original price + Taxed Amount
= x + 0.07x
= 1.07x
Therefore, the expressions could represent how much Leila pays in total for the model 1.07x
Hope it will find you well.
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<h3>Answer: 680 different combinations</h3>
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Explanation:
If order mattered, then we'd have 17*16*15 = 4080 different permutations. Notice how I started with 17 and counted down 1 at a a time until I had 3 slots to fill. We count down by 1 because each time we pick someone, we can't pick them again.
So we have 4080 different ways to pick 3 people if order mattered. But again order doesn't matter. All that counts is the group itself rather than the individual or how they rank. There are 3*2*1 = 6 ways to order any group of three people, which means there are 4080/6 = 680 different combinations possible.
An alternative is to use the nCr formula with n = 17 and r = 3. That formula is
where the exclamation marks indicate factorials