Respuesta :

thebecks

Answer:

-4e-9

Step-by-step explanation:

3e-19-7e+10

3e-7e-19+10

-4e-9

Answer:I believe the answer is  -4e-9

Step-by-step explanation:

Well first you take 3e and -7e and add them to get -4e and then add 10 to -19 to get -9, and then your answer is -4e-9.  I really hope this helps!  :)