9,15 it that equivalent

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240