Answer:
21
Step-by-step explanation:
Substitute.
We are given x = 3, y = 9 and z = 2
3(9-2) = 3(7) = 21
2.7 x 7.3 = 19.7...
hope this helps!
If it took one hour to complete a card game, we can tell that the average play time varies around that time.
So only one game can be completed in one hour.
Hope it helped,
Happy homework/ study/ exam!
y = - 25
since x varies directly with y then we can express the relationship as
x = ky ← k is the constant of variation
to find k use the given condition y = - 10 when x = 4
k =
=
= - 
hence x = -
y
when x = 10
10 = -
y
multiply both sides by - 5 and divide both sides by 2 )
- 50 = 2y ⇒ y = - 25