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ryzh [129]
3 years ago
7

find three consecutive even integers such that the sum of the smallest integer and twice the second is 12 more than the third (o

nly an algebraic solution will be accepted )
Mathematics
1 answer:
Helga [31]3 years ago
3 0
Let us call them a, b and c
we know that
a+1=b
a+2=c
a+2b=12+c
we can deduce the following:
a+2(a+1)=12+(a+2)
3a+2=a+14
2a=12
a=6

so b would be 7 and c would be 8
Makes sense ?
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So hmmm there are 5pennies in a nickel, and 10pennies in a dime and 25pennies in a quarter

now, in $6.10, there are 610 pennies

n = amount of nickels coins
d = amount of dime coins
q = amount of quarter coins

so... we know, there are 5*n or 5n pennies in the nickels, and 10*d or 10d pennies in the dimes and 25*q or 25q in the quarter coins, and we know their sum is 610 pennies total, thus

5n + 10d + 25q = 610

now, there are 4 more "n" then "d", so whatever "d" is, "n" is 4  more than that
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and twice as many "q" than "n", so, whatever "n" is, then
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\bf 5n+10d+25q=610\implies n+2d+5q=122\qquad 
\begin{cases}
n=d+4\\
q=2n\\
------\\
q=2(d+4)\\
\qquad 2d+8
\end{cases}
\\\\\\
\boxed{d+4}+2d+5\left( \boxed{2d+8} \right)=122

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6 0
3 years ago
I need help on this one
stiks02 [169]

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$7897.50

Step-by-step explanation:

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Answer:

Step-by-step explanation:

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We have to analyze a track report of the customers who ordered an appetizer and dessert.

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Therefore 0.2 means 20% of the customer ordered an appetizer but no dessert was ordered.

Option B. is the answer.

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