Answer:
choice 3) scale factor of 3
Step-by-step explanation:
3 times length + 3 times width = 9 times area
Mr. Zelman gave 400 books to his nephew
<em><u>Solution:</u></em>
Given that, Mr. Zelman wants to give 50% of his comic book collection to his nephew Alex
Mr. Zelman has 800 comic books
Number of books with Zelman = 800
Mr. Zelman wants to give 50% of books to Alex
Number of books given to nephew = 50 % of books of Zelman
Therefore, we have to find 50 % of 800
![\rightarrow 50 \% \text{ of } 800](https://tex.z-dn.net/?f=%5Crightarrow%2050%20%5C%25%20%5Ctext%7B%20of%20%7D%20800)
![\rightarrow 50 \% \times 800\\\\\rightarrow \frac{50}{100} \times 800 = 400](https://tex.z-dn.net/?f=%5Crightarrow%2050%20%5C%25%20%5Ctimes%20800%5C%5C%5C%5C%5Crightarrow%20%5Cfrac%7B50%7D%7B100%7D%20%5Ctimes%20800%20%3D%20400)
Thus he gave 400 books to his nephew
Answer:
El área es 2 veces el cuadrado del ancho del rectángulo.
Step-by-step explanation:
El área de un rectángulo viene dado por:
![A = a*l](https://tex.z-dn.net/?f=%20A%20%3D%20a%2Al%20)
En donde:
a: es el ancho
l: es el largo
Si el largo es el doble del ancho:
![l = 2a](https://tex.z-dn.net/?f=%20l%20%3D%202a%20)
Entonces el área es:
![A = a*l = a*(2a) = 2a^{2}](https://tex.z-dn.net/?f=%20A%20%3D%20a%2Al%20%3D%20a%2A%282a%29%20%3D%202a%5E%7B2%7D%20)
Por lo tanto, el área es 2 veces el cuadrado del ancho del rectángulo.
Espero que te sea de utilidad!