Z = 60 + 96 X+ 72 Y– 9 X 2 Y 2 + 0.7 X 3 + 1.5 Y 3 Use the above details to provide the answer to the following questions.∂TC/ ∂X∂TC / ∂Y∂2TC / ∂Y∂X∂2Q / ∂X∂Y

answer: true

step-by-step explanation:

$119.20

step-by-step explanation:

$372.50 - 60% off is $149. $149-20% off is $119.20

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x

the answer to this in exact form is 4/35 but in decimal form its 0.1142857

hope this if needed hmu