Answer:
20 is 45
25 is 50
Step-by-step explanation:
Answer:
Step-by-step explanation:
Ratios of perimeters is a one-to-one measure. From the figure on the left to the one on the right the ratio of the one-to-one measure is 45/25 which reduces to 9/5.
Area is a squared measure. Once we have the perimeter reduced (we do), we square those perimeter measures to find the area ratio.
![(\frac{9}{5})^2=\frac{81}{25}](https://tex.z-dn.net/?f=%28%5Cfrac%7B9%7D%7B5%7D%29%5E2%3D%5Cfrac%7B81%7D%7B25%7D)
Answer:
n + 6
Step-by-step explanation:
5n - 3 ( n - 2 ) - n
4n - 3 ( n -2 )
4n - 3n - 3 x (2)
4n - 3n - 3 x 2
4n - 3n + 6
n + 6
I got B. I multiplied the numbers in pairs of two and then added the three sums.
Answer:
![\text{A. }4:81](https://tex.z-dn.net/?f=%5Ctext%7BA.%20%7D4%3A81)
Step-by-step explanation:
Since surface area consists of the sum of the outer faces of each polygon, the ratio of the two surface areas will be equal to the ratio of the side lengths squared (since we multiply them to get area).
The ratio of the corresponding side lengths of the solids are
. Therefore, the ratio of their surface areas must be ![2^2:9^2=\boxed{4:81}](https://tex.z-dn.net/?f=2%5E2%3A9%5E2%3D%5Cboxed%7B4%3A81%7D)