Step-by-step explanation:
the answer is 42 because 2 times the 21 equals 42
Answer:
Kahn academy works great with this stuff
Step-by-step explanation:
Answer:
to get what he kept subtract 5 from 18, to get 13 so 13 was kept. the ratio will be kept:sold which is 13:5
Answer:

Step-by-step explanation:

» Collect second degree terms (x² coefficients) together and first degree terms (x coefficients) and constants

Answer:
not sure what type you mean but here are options
Step-by-step explanation:
30+4=34
thirty-four