Answer:
a. 22.5 km
b. 267.52 m
c. 95 m
d.
km
Step-by-step explanation:
a. You can convert from hectometers to kilometers, and then you can make the multiplication:
![\frac{5hm}{10}=0.5km](https://tex.z-dn.net/?f=%5Cfrac%7B5hm%7D%7B10%7D%3D0.5km)
![(3km)(0.5km)(15)=22.5km](https://tex.z-dn.net/?f=%283km%29%280.5km%29%2815%29%3D22.5km)
b. You can convert from centimeters to meters, and then you can make the multiplication:
![\frac{44cm}{100}=0.44m\\(19m)(0.44m)(32)=267.52m](https://tex.z-dn.net/?f=%5Cfrac%7B44cm%7D%7B100%7D%3D0.44m%5C%5C%2819m%29%280.44m%29%2832%29%3D267.52m)
c. You only need to divide 1,140 meters by 12:
![\frac{1,140m}{12})=95m](https://tex.z-dn.net/?f=%5Cfrac%7B1%2C140m%7D%7B12%7D%29%3D95m)
d. You can convert from hectometers to kilometers, from decameters to kilometers and from meters to kilometers, and divide this by 15:
![\frac{6hm}{10}=0.6km](https://tex.z-dn.net/?f=%5Cfrac%7B6hm%7D%7B10%7D%3D0.6km)
![\frac{7dam}{100}=0.07km](https://tex.z-dn.net/?f=%5Cfrac%7B7dam%7D%7B100%7D%3D0.07km)
![\frac{5m}{1000}=0.005km](https://tex.z-dn.net/?f=%5Cfrac%7B5m%7D%7B1000%7D%3D0.005km)
km
In this question, you have to isolate <em>x</em>.
First, use the distributive property.
![3x+30=4x+32](https://tex.z-dn.net/?f=3x%2B30%3D4x%2B32)
Now that you have distributed, subtract the constants.
If you're talking about just the decimal, then yes it is.
If you're talking about 22/7, then it still is.
But if you're talking about pi, then it isn't rational.
The first one is B and the second is D