Answer:

Step-by-step explanation:
can also be written as 

Simply to 
-OTHER METHOD-
can be simplified to 

Answer:
So, this week Linda will to practice 63 hours.
Best regards
Step-by-step explanation:
9 hours * 7 day/week
You can't unless you have other information.
Hope this helps :)
Answer:
2x + 4y =8
substitute 0 for x
2 (0) + 4y = 8
0 +4y = 8
subtract 0 from both sides
-0 +4y =8 - 0
4y = 8
Divide both sides by 4
Y = 2
Step-by-step explanation:
9514 1404 393
Answer:
5
Step-by-step explanation:
We presume the figure is a rectangular pyramid and that there are two hidden faces, one on the bottom and one at the back.
We can see 3 faces, so adding the two we presume we can't see, there are a total of 5 faces on this polyhedron.