Answer: option B.
Step-by-step explanation:
You can apply the elimination method:
- Multiply the first equation by -7 and the second equation by 3.
- Add both equations to cancel out the variable y.
- Solve for x
![\left \{ {{(-7)9x+3y=(-39)(-7)} \atop {(3)(4x+7y)=(-57)(3)}} \right.\\\\\left \{ {{-63x-21y=273} \atop {12x+21y=-171}} \right.\\-------\\-51x=102\\x=-2](https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7B%28-7%299x%2B3y%3D%28-39%29%28-7%29%7D%20%5Catop%20%7B%283%29%284x%2B7y%29%3D%28-57%29%283%29%7D%7D%20%5Cright.%5C%5C%5C%5C%5Cleft%20%5C%7B%20%7B%7B-63x-21y%3D273%7D%20%5Catop%20%7B12x%2B21y%3D-171%7D%7D%20%5Cright.%5C%5C-------%5C%5C-51x%3D102%5C%5Cx%3D-2)
- Substitute x=-2 into any of the original equations ans solve for y. Then:
![9(-2)+3y=-39\\-18+3y=-39\\3y=-21\\y=-7](https://tex.z-dn.net/?f=9%28-2%29%2B3y%3D-39%5C%5C-18%2B3y%3D-39%5C%5C3y%3D-21%5C%5Cy%3D-7)
Answer: 890 commuters carpool
Step-by-step explanation:
10% of 8900 = 890
8900/10= 890
Note: 10% to decimal form is 10
Answer:
The top of the rectangle is 12 inches in area and 14 inches in perimeter. The sides are 28 inches in area and 22 inches in perimeter.
Step-by-step explanation:
7x4=28 -area
7+7=14, 4+4=8, 14+8=22 -perimeter
3x4=12 -area
3+3=6, 4+4=8, 6+8=14 -perimeter
Answer:
Step-by-step explanation:
Can you please show us the image