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raketka [301]
3 years ago
7

No entiendo ayuda plsssss

Mathematics
1 answer:
natulia [17]3 years ago
5 0

Answer:

23/24

Step-by-step explanation:

I hope it will help

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The speed of a stream is 4km/h. A boat travels 6 km upstream in the time it takes to travel 12 km downstream. What is the speed
Usimov [2.4K]
<span>6 km × 1 hour/(b-4 km) = 12 km × (1 hour/(b+4 km) 

6/(b-4) hours = 12/(b+4) hours

6(b+4) = 12(b-4)

6b + 24 = 12b - 48
72 = 6b
b = 12 
The boat's speed in still water is 12 km/hour.</span>
4 0
4 years ago
Evaluate the expression when a = 13. 89 + a
Korvikt [17]

Answer:

102

Step-by-step explanation:

89 + a

Let a=13

89+13

102

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3 years ago
HELP!!!!ASAP!!!!Anna and Ariana work at after-school child care center. Together they cared for 32 children this week. Anna care
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19.2

Step-by-step explanation:

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3 years ago
Hii i’ll give brainliest please help thanks :)
nadezda [96]

Answer: The median score will remain the same at 91.

Step-by-step explanation: The median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average. Write all of the numbers and cross out a even amount of numbers on both sides. Image 1 shows the problem with original numbers. Image 2 shows problem with new numbers

4 0
3 years ago
United States flags come in different sizes. Standard dimensions for a flag are a length to width ratio of 1 : 9 to 1. Flag 1 ha
frez [133]

Answer:

5.13 feet

Step-by-step explanation:

So, we have the full dimensions of flag #1, and we have the partial dimensions of flag #2, which should follow the same ratio as flag #1, since not indicated otherwise.

When you need to compare dimensions like that, the easiest way to proceed is to do a cross-multiplication. Let's say x is the length of flag #2 we're looking for.  It's ratio over the width of flag #2 will be the same as the ratio of the length of flag #1 over its width, so:

\frac{x}{2.7} = \frac{1.9}{1}

If we isolate x, we have x = (2.7 * 1.9) / 1 = 5.13 feet

Which makes sense since we know the result should be a bit less than 2.7 times 2.

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3 years ago
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