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love history [14]
3 years ago
15

Rosita earns money by walking dogs after school and on the weekends . She walks Madeline every other day ,Buddy every forth day

, and Ernie every third day . Today she walked all thee dogs . What day did Rosita walk all three dogs?
Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
5 0

Answer:

  • <u><em>Rosita will walk all three dogs in 12 days.</em></u>

Explanation:

Madeline is walked every other day means every two days: 2.

Buddy is walked every fourth day: 4.

Ernie is walked every third day: 3.

You need to find the least common multiple (LCM) of 2, 4, 3.

Decompose each number into its prime factors:

  • 2 = 2
  • 4 = 2²
  • 3 = 3

The LCM is the product of the common factors and non common factors each raised to its the greatest power:

  • LCM = 2² × 3 = 12

Then, Rosita will walk all three dogs in 12 days.

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Answer:

825 g

Step-by-step explanation:

Here's my work:

500g Cl2 l   1mol Cl2  l  2 mol NaCl   l  58.5 g NaCl

                l   71 g Cl2    l  1 mol Cl2      l    1 mol NaCl  

= 823.94  - the rounding can be a little off

The first thing you have to do is convert the 500 g of Cl2 into moles.  So you get the mass of Cl which is 35.5, but Cl is diatomic by itself so you multiply 35.5 x 2 and get 71.   now on the third column you are comparing the mol ratios of the equation.  The equation is 2Na + Cl2 ---> 2NaCl, so you see that there is no coefficient in front of Cl2 so that means there is 1 mol, and then you see that in the product there is a  coefficient of 2 in front of NaCl so that means there is 2 moles.  Then finally you have to convert the moles backs into grams where you just add the masses of Na and Cl .  You multiply across the top  and then divide that number by the bottom row.

6 0
2 years ago
43.5 centimeters by 934 millimeters. Hello many centimeters are wood framing will she need
IRINA_888 [86]
273.8cm of wood framing

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3 years ago
What is the simplest form of this expression? <br>5(-b+2) 47
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(-5b+10)47

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3 years ago
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Find the y intercepts I'll mark the brainliest<br>​
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Answer:

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