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torisob [31]
3 years ago
9

Kaya rented a limo their one time charge was for $70 plus an hourly rate of $40. The total for her friend was also $600 for the

night, how many hours (h) did kayas friend rent the limo for?
Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
7 0

Answer:

13.25 hours

Step-by-step explanation:

40x13.25+70=600

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The left and right page numbers of an open book are two consecutive integers whose sum is 389.  Find these page numbers
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\text {The Answer to this Problem Is:}

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il63 [147K]

Odd numbers take the form 2n-1, where n\ge1 is an integer. When n=400, the last odd number would be 799. So we're adding

S=1+3+5+\cdots+795+797+799

By reversing the order of terms, we have

S=799+797+795+\cdots+5+3+1

and we can pair up terms in both sums at the same position to write

2S=(1+799)+(3+797)+(5+795)+\cdots(795+5)+(797+3)+(799+1)

so that we are basically adding 400 copies of 800, and from there we can find the value of the sum right away:

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###

We could also make use of the formulas,

\displaystyle\sum_{i=1}^n1=n

\displaystyle\sum_{i=1}^ni=\dfrac{n(n+1)}2

We have

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3 years ago
2x &lt; - x + 20 + 7 I don't get how to answer this question
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ANSWER

X < 9

Solve

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2x < - x + 27 change the signs

2x + x < 27 add the like terms

3x < 27 divide by 3

x < 9

6 0
3 years ago
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