The error is if you add all of those times up it is equal to 7.55 minutes and that's more than 6
Answer:
Step-by-step explanation:
It is given that, 
We need to find the value of 
As
Solving LHS
Now comparing the coefficients of 
In LHS the coefficient of is 25
In RHS the coefficient of is
It implies that,
So, the value of is 25.
Answer:
See below.
Step-by-step explanation:
That is a one-to-one function.
Answer:
x = - 5
Step-by-step explanation:
Given y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = - 18 when x = 3 , then
- 18 = 3k ( divide both sides by 3 )
- 6 = k
y = -6x ← equation of variation
When y = 30 , then
30 = - 6x ( divide both sides by - 6 )
- 5 = x
