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Sphinxa [80]
3 years ago
13

Once you have the value of a variable, how can you check that it is correct?

Mathematics
1 answer:
RideAnS [48]3 years ago
5 0

Answer:Once you have the value of a variable you can check by plugging it into the equation and seeing if it’s right or not

Step-by-step explanation:

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Micaela is 2 years older than Sam. In 4 years, the sum of their ages will be 40. How old is Micaela now?
Ann [662]

Answer:

The error is: The solution shows the Sam's age and the problem asked for Micaela's age.

Solution fixed: m=17

Micaela is 17 years old now.

Step-by-step explanation:

The error is: The solution shows the Sam's age and the problem asked for Micaela's age.

To fix the error, you can set up these equations based on the information given:

m=s+2  

(m+4)+(s+4)=40  

Solve for "s" from the first equation:

s=m-2

Substitute this equation into the second equation:

(m+4)+((m-2)+4)=40  

Now you need to solve for "m":

m+4+(m-2+4)=40\\m+4+m+2=40\\m+m=40-4-2\\2m=34\\m=\frac{34}{2}\\\\m=17

Micaela is 17 years old now.

4 0
3 years ago
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What is the correct answer to this question?<br><br> F/2=5/8
ANTONII [103]

Answer:

F = 1.25

Step-by-step explanation:

All you would have to do is cross multiply, so our equations starts at \frac{F}{2} = \frac{5}{8}. We would now multiply F by 8 and 2 by 5. We now have 8F = 10. We can now divide both sides of the equation by 8 to get F = 1.25.

4 0
3 years ago
A horse gallops 16 miles in 2 hours. How many hours would it take the horse to gallop 40 miles?
lana66690 [7]

Answer: 5 Hours

Step-by-step explanation: <em>Divide 2 by 16 to get how many hours it takes to run 1 mile. Then multiply that number by 40 to get how many hours it would take run 40 miles.</em>

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3 years ago
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Cause you have the slashes and 2/4/5/6/7and 3/4/5/6/7
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3 years ago
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