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Lostsunrise [7]
2 years ago
11

2.1(0.2x−1.4)=1.3(0.4x−3.5)

Mathematics
2 answers:
NeTakaya2 years ago
8 0

Answer:

x=9.84375

Step-by-step explanation:

...

ella [17]2 years ago
7 0

Answer:

16.1=x

Step-by-step explanation:

2.1(0.2x-1.4)=1.3(0.4x-3.5)  Distribute          

0.42x-2.94=0.52x-4.55  Combine like terms

+4.55                     +4.55  

0.42x+1.61=0.52x

-0.42x         -0.42x  

<u>1.61</u>=<u>0.1x</u>

0.1     0.1              

16.1=x

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a piggy bank contained $14.55 in quarters dimes and nickels if there were three more than twice as many dimes as nickels and thr
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<span>Let x=number of nickels in the piggy bank
(2x+3)=number of dimes in the piggy bank
(3x-3)=number of quarters in the piggy bank

.05x+.10(2x+3)+.25(3x-3)=14.55
.05x+.20x+.30+.75x-.75=14.55

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<span>
1.00x=14.55+.45
x=15
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3x-3=42

The number of nickles in the piggy bank would be 15.
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<span><span>The number of dimes in the piggy bank would be 33
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<span>The number of quarters in the piggy bank would be 42. </span>

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What is the measure of angle X ?
Rus_ich [418]

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6 0
3 years ago
Five bells begin to ring together and they ring at intervals of 3, 6, 10, 12 and 15 seconds, respectively. How many times will t
Evgen [1.6K]

Answer:

60 times will they ring together at the same second in one hour excluding the one at the end.

Step-by-step explanation:

Given : Five bells begin to ring together and they ring at intervals of 3, 6, 10, 12 and 15 seconds, respectively.

To find : How many times will they ring together at the same second in one hour excluding the one at the end?

Solution :

First we find the LCM of 3, 6, 10, 12 and 15.

2 | 3  6  10  12  15

2 | 3  3   5   6  15

3 | 3  3   5   3  15

5 | 1    1  5   1    5

  | 1    1   1   1     1

LCM(3, 6, 10, 12,15)=2\times 2\times 3\times 5

LCM(3, 6, 10, 12,15)=60

So, the bells will ring together after every 60 seconds i.e. 1 minutes.

i.e. in 1 minute they rand together 1 time.

We know, 1 hour = 60 minutes

So, in 60 minute they rang together 60 times.

Therefore, 60 times will they ring together at the same second in one hour excluding the one at the end.

6 0
2 years ago
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