Answer:
y = - 10
Step-by-step explanation:
Given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 2 when x = - 4, that is
2 = - 4k ( divide both sides by - 4 )
= k, that is
k = -
y = - x ← equation of variation
When x = 20, then
y = - × 20 = - 10
There is no answer to that. 11/10 = 1.1, and 10/9 = 1.1
Increasing the price of a lolly would mean that the cost would go above $10 and $11, whilst decreasing the price would mean both go below $10 and $11
Answer:
-12
Step-by-step explanation:
x+7-4x=19-2x
-3x+2x=19-7
-x=12
x=-12
Answer:
4/6=t/(t+1)
Step-by-step explanation:
4/6=t/(t+1)