Answer:
20.46 ft²
Step-by-step explanation:
Area of trapezium:
½×(sum of parallel sides)×height
= ½(2.9+9.5)×3.3
= 20.46
y = (4*10^8)^2 Both factors in the brackets are squared.
4^2 = 16
(10^8)^2 = 10^(2*8) = 10^16
y = 16 * 10^16
y = 1.6 * 10^1 * 10^16
y = 1.6 * 10^(1 + 16)
y = 1.6 * 10^(17) <<<<<< Answer I'd use the brackets unless instructed not to.
Answer:
![x = 25](https://tex.z-dn.net/?f=x%20%3D%2025)
Step-by-step explanation:
![(4x) + (5 + 3x) = 180](https://tex.z-dn.net/?f=%284x%29%20%2B%20%285%20%2B%203x%29%20%3D%20180)
![4x + 5 + 3x = 180](https://tex.z-dn.net/?f=4x%20%2B%205%20%2B%203x%20%3D%20180)
![7x + 5 = 180](https://tex.z-dn.net/?f=7x%20%2B%205%20%3D%20180)
![7x = 180 - 5](https://tex.z-dn.net/?f=7x%20%3D%20180%20-%205)
![7x = 175](https://tex.z-dn.net/?f=7x%20%3D%20175)
![\frac{7x}{7} = \frac{175}{7}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7x%7D%7B7%7D%20%20%3D%20%20%5Cfrac%7B175%7D%7B7%7D%20)
![x = \frac{175}{7}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B175%7D%7B7%7D%20)
![x = 25](https://tex.z-dn.net/?f=x%20%3D%2025)