Here are the masses of the so called inner planets of the solar system. Mercury: 3.3022 x 10^23 kg
Venus:4.8685 x 10^24 kg
Earth: 5.9722 x 10^24 kg
Mars:6.4185 x 10^23 kg

What is the average mass of all four inner planets? Write your answer in scientific notation.

i just took the test, the correct answer is .. 31.5 in.

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)