If y varies directly as x and y = 9 when x = –3, find y when x = 40.
1 answer:
Answer:
y = -120
Step-by-step explanation:
Direct variation is
y = kx where k is a constant
9 = k(-3)
Divide each side by -3
9/-3 = k
-3 = k
y = -3x
Let x = 40
y = -3(40)
y = -120
You might be interested in
9-6i is the answer, combine like terms
Equation: 4x+3=43
Solved: 4x=43-3
4x=40
X=10
R = 3
6x3=18
18x3=54
54x3=162 ...
D. f(x)=4 (5/2)^x
Are really good tool for graphing problems is Demos.com
