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Suppose that y varies directly as the cube of x If x is tripled what is the effect on y?
y will be multiplied by 27. Remember, whatever you do to one side of an equation, you must do to the other.
In this case, the relationship between x and y would be expressed as
y = x^3
To triple x would look like
y = (3x)^3 ...b/c you're tripling the value x alone, not the entire term x^3
y = 27x^3 ...after distributing the exponent (3^3 = 27)
In order to set both sides of the equation equal, y must be multiplied by 27...
27y = 27x^3
TADA!
What else can I help you with?
What is the constant of variation if y varies directly with x and if y equals 500 when x equals 10?
50
If y varies directly as x what is the value of y in these ordered pair 8 4 and 4 y?
It is 2.
Let y 21 and x 1.5 if y varies directly with x find y when x 9?
No
Does y varies directly with x if y54 when x 6?
y=54 if x=6 so we can write y=9(x) so y=k(x) clearly y is directly proportional to x.
X varies directly with y and inversely with z x equals 0.25 y equals 10 and z equals 20 find x when y is 20 and z is 10?
1
What is the effect of impurities on boiling point of different chemicals?
It varies. A saturated solution of NaCl in water increases the boiling point, higher than 100oC. I suppose most impurities increase the boiling point.
Suppose y varies directly as x if y equals 4 when x equals -2 what is y when x equals 30?
y varies directly as x y=kx, where k is any constant y = 4 when x=-2 4 = k (-2) 4 =-2k k=-2 Therefore, y=-2x When x=30 y = -2(30) = -60
Is straight hair better than curly?
I'd suppose it varies from person to person
Suppose y varies directly with x and y equals 12 when x equals 6write an equation realting x and y?
y = kx ie y/x = k, k = 2, so y = 2x
A varies directly as b and a equals 12 when b equals 4 What is the constant of variation?
a varies directly as b and a = 12 when b = 4. What is the constant of variation?
What is the constant of variation k if x .5 and y 1 Assume y varies directly as x?
If y varies directly as x then k = 2.
If y varies directly as x squared find k when x 2 and y 8?
If y varies directly as x and if x = 2 when y = 8 then k = 4.
When you are using elevated surface from bottom to up is distance varies with time?
No. There is no reason to suppose that the elevated surface is moving.
If y varies directly x squared find k when y -9 and x-1?
-8
What is the duration of effect of nux vomica?
It varies from individual to individual.
Suppose that y varies with x Write an equation for the inverse variation y 4 when x 7?
If y varies with x, then there cannot be an inverse variation between x and y!
The density of capillaries within a tissue varies directly with the tissues?
rate of metabolism
