Answer:
The value is -30
Step-by-step explanation:
Plug -6 in for x in the equation:
3sqrt-6(-6)+4(-6)
-6-4*6
-6-24
-30
Answer:
x = - 6
Step-by-step explanation:
Given that 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 = - 9 when x = 3, thus
k =
=
= - 3
y = - 3x ← equation of variation
When y = 18, then
18 = - 3x ( divide both sides by - 3 )
x = - 6
Answer:

Step-by-step explanation:
Set up the equation:
Since C(t) gives the number of cars purchased in the t-th year after 1998, then make the number of cars equal to 15 000 and solve for t - the year:
20t^2 = 15000
t^2 = 750
t = 
The year will be simply 1998 + 5 \sqrt{30}
3279 is greater than 3273
$13.68 because you do [.18+.06=.24] [18•.24=4.32] [18-4.32=13.68]