Answer:
Step-by-step explanation: she can have four people go and have the last 4 dollers can go in to her buying the lanes
Answer:
Best to draw out a factor tree.
Answer:
r = 6
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
PR² = PQ² + QR² , substitute values
(r + 4)² = r² + 8²
r² + 8r + 16 = r² + 64 ( subtract r² from both sides )
8r + 16 = 64 ( subtract 16 from both sides )
8r = 48 ( divide both sides by 8 )
r = 6
Answer:
x = -2 & y = 6
Step-by-step explanation:
![10x+10y=40](https://tex.z-dn.net/?f=10x%2B10y%3D40)
![10x+10y+ -10y=40+-10y](https://tex.z-dn.net/?f=10x%2B10y%2B%20-10y%3D40%2B-10y)
![10x=-10y+40](https://tex.z-dn.net/?f=10x%3D-10y%2B40)
![\frac{10x}{10} =\frac{-10y+40}{10}](https://tex.z-dn.net/?f=%5Cfrac%7B10x%7D%7B10%7D%20%3D%5Cfrac%7B-10y%2B40%7D%7B10%7D)
![x=-y+4](https://tex.z-dn.net/?f=x%3D-y%2B4)
![5x+3y=8](https://tex.z-dn.net/?f=5x%2B3y%3D8)
![5(-y+4)+3y=8](https://tex.z-dn.net/?f=5%28-y%2B4%29%2B3y%3D8)
![-2y+20=8](https://tex.z-dn.net/?f=-2y%2B20%3D8)
![-2y+20+-20=8+-20](https://tex.z-dn.net/?f=-2y%2B20%2B-20%3D8%2B-20)
![-2y=-12](https://tex.z-dn.net/?f=-2y%3D-12)
![\div2](https://tex.z-dn.net/?f=%5Cdiv2)
![y=6](https://tex.z-dn.net/?f=y%3D6)
![x=-y+4](https://tex.z-dn.net/?f=x%3D-y%2B4)
![x=-6+4](https://tex.z-dn.net/?f=x%3D-6%2B4)
![x=-2](https://tex.z-dn.net/?f=x%3D-2)
Hope this helps.