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AlekseyPX
3 years ago
15

Complete the three-by-three magic square (that is,the sums of the numbers in each row, in each column and in each of the diagona

ls are the same) using
Mathematics
1 answer:
lara [203]3 years ago
4 0

 

\displaystyle\\\text{We will use numbers from 1 to 9.}\\\\1+2+3+4+5+6+7+8+9=\frac{9(9+1)}{2}=\frac{9\times10}{2}=\frac{90}{2}=\boxed{\bf45}\\\\\text{the sums of the numbers in each row, in each column are }=\frac{45}{3}=\boxed{\bf15}\\\\\text{Solution:}\\\\\boxed{\,2\,}\boxed{\,7\,}\boxed{\,6\,}\\\boxed{\,9\,}\boxed{\,5\,}\boxed{\,1\,}\\ \boxed{\,4\,}\boxed{\,3\,}\boxed{\,8\,}\\\\\text{Convenient rotation of the square gives 8 solutions.}

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5 0
3 years ago
You owe your mom 10$. You pay her back 7$. Write an expression that can be used to represent this situation.
mezya [45]

Answer:

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Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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Scorpion4ik [409]

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6 0
2 years ago
Which expression to a+ (c+7)?<br>​
Ann [662]

Answer:

(a + c) + 7

hope this helps

7 0
2 years ago
Maya is solving the quadratic equation by completing the square.
kvasek [131]

Step-by-step explanation:

factor 4 out of the variable terms, as this helps.

but my approach is simply to define the target and then calculate "backwards".

we want to find

(ax + b)² = a²x² + 2abx + b²

and now we compare with the original equation :

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(2x + 4)² - 13 = 0

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6 0
1 year ago
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