Which is a characteristic of aromatic hydrocarbons? O A. They have single and double bonds.
B. They have only double bonds.
C. They have single and triple bonds.
D. They have triple and double bonds.

m=9

step-by-step explanation:

7m+8=71 subtract   8 from 71 which is 63 than divide it by 7m   equal 9.

                             

Sun is explosive itself spread 9 planets.earth is 3rd explosive in the solar system about 500 hundred million years ago . first earth became ice age and freezing climate.centre of earth magma. north zone is artic . south is anatric