Solve this system of equations by graphing. First graph the equations, and then type the solution.
y = x + 6
y = -x

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Ответ:

yair7

20.09.2021

Mathematics

Step-by-step explanation:

Let the number of non-fiction books be x .

Then the number of fiction books= $\frac{2}{5}x$

Since, there are 56 books in the school library.

Then, $\\\Rightarrow\frac{2}{5}x+x=56$

$\frac{2x+5x}{5}=56\\\Rightarrow\ \frac{7x}{5}=56\\\Rightarrow\ x=\frac{56\times5}{7}\\\Rightarrow\ x=40$

Hence, the number of non fiction books = 40

Therefore, the number of fiction books = $\frac{2}{5}40=16$

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Solve this system of equations by graphing. First graph the equations, and then type the solution. y = x + 6 y = -x