Homework help please my dad is mad

Question

The temperature, T, (in degrees Kelvin), of an enclosed gas varies jointly with the product of the volume, V (in cubic centimeters), and the pressure, P (in kilograms per square centimeter). The temperature of a gas is 294 K when the volume is 800 cubic centimeters and the pressure is 0.75 kilograms per square centimeter. What is the temperature when the volume is 7000 cubic centimeters and the pressure is 0.87 kilograms per square centimeter.

Answer 1

temperature varies jointly with volume and pressure:

T = k V * P

where k is a fixed number constant

294 = k * 800 * 0.75 = 800 * 3/4

294 = k * 600

k = 294/600 = 147/300

The function is

T = (147/300) * V * P

= (147/300) * 7000 * 0.87

= 994.7

There , now he does not need to be angry anymore

Answer 2

T = VPk

T / VP = k

294 / (800)(0.75) = T / (700)(0.87)

Can you solve for T and answer?