Find the constant of variation for the relation and use it to write and solve the equation. if y varies directly as x and as the square of z, and y=25/9 when x=5 and z=1, find y when x=1 and z=4

When x = 1 and z = 4,  

Step-by-step explanation:

The variation described in the problem can be written using a constant of proportionality "b" as:

The other piece of information is that when x = 5 and z = 1, then y gives 25/9. So we use this info to find the constant "b":

Knowing this constant, we can find the value of y when x=1 and z=4 as:

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: