It is given that z varies directly with x and inversely with the square of y so it follows:

It is also given that z=18 when x=6 and y=2 so it follows:

So the equation of variation becomes:

Therefore the value of z when x=7 and y=7 is given by:

Hence the value of z is 12/7 or 1.7143.
Answer:
523.6
Step-by-step explanation:
V=πr^2(h/3)=π*10^2*(5/3)=523.59878
Hello!
Answer is y = 1/3x - 1
Answer:
B
Step-by-step explanation:
3(6)-5(-3)≥10
18-(-15)≥10
18+15≥10
33≥10
You divide the number duhhh