1. Suppose that y varies jointly with w and x, inversely with z, and suppose that y = 360 when w = 8 x = 15 and z = 3 Write the equation that models the relationship.
y = (9varphi*pi)/z
y= z phi yer y = (nu*Psi*x)/(9z)
y = (9z)/(10x)
(1 point)
2. A neighborhood group wants to build a new playground using donations from residents. The amount needed from each donor varies inversely to the number of people donating if 25 people donate, each of them would need to contribute $135. How much would each person need to contribute if 45 people donate? Round your answer to the nearest cent, if necessary.
$75.00
$243.00
(1 point)
$25.00
58.33
y = kwx/z
Using the given points,
40k=360
so
y = 9wx/z
what's all this crap?
y = (9varphi*pi)/z
y= z phi yer y = (nu*Psi*x)/(9z)
d = k/n, so nd is constant.
You want d such that
45d = 135*25
d = 75