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Aleks [24]
3 years ago
13

Five times a number subtracted from 18 is triple the number find the number

Mathematics
1 answer:
Bess [88]3 years ago
4 0
The number is 18

hope this helps
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Write the expression 12^-2 in simplest form.
olga2289 [7]

Answer:

Step-by-step explanation:

1/12^2 = 1/144

8 0
2 years ago
To the nearest whole number, what is the mean number of letters per word in this sentence?
sertanlavr [38]
I counted 72 letters and 17 words so...
72/17 = 4.23 to the nearest whole number: 4 letters per word
5 0
3 years ago
Kevin and Randy Muise have a jar containing 80 ​coins, all of which are either quarters or nickels. The total value of the coins
SCORPION-xisa [38]

Answer:

  • 39 quarters and 41 nickels

Step-by-step explanation:

Let the number of quarters be x and nickels be y.

<u>Given:</u>

  • Quarter is 25 cents
  • Nickel is 5 cents
  • Number of coins is 80
  • Total amount is $11.80 = 1180 cents

<u>We have equations:</u>

  • x + y = 80
  • 25x + 5y = 1180

<u>Solve the system by elimination, subtract 5 times the first equation from the second one:</u>

  • 25x + 5y - 5x - 5y = 1180 - 80*5
  • 20x = 780
  • x = 780/20
  • x = 39

<u>Find the value of y:</u>

  • 39 + y = 80
  • y = 80 - 39y = 41

<u>Verify:</u>

  • 25*39 + 5*41 = 975 + 205 = 1180
7 0
2 years ago
What is 0.275 0.20 0.572 and 0.725 greatest to least
Andru [333]
.725 , .572 , .275, .2
You look at the first decimal place to see which is the greatest. 7 is greater than 5 and 2 so it's first. Then 5 is greater than 2 so it is next. For the last two numbers since 2 is the same value you look at the next decimal place. Since 7 is greater than 0 it comes next!
6 0
3 years ago
Fractions and integer operations practice, I need help please.
olga2289 [7]
40/11 = 3.63
hope this helps
3 0
4 years ago
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