Answer:
Step-by-step explanation:
(9+(15*15))+7=241
S=3/5, because if we multiply 3 on both sides (to isolate the s), then 1/5 times 3 is 3/5 (and 1/3 times 3 is 1)
The answer is A and here is how I solved it
(−7a − 19c) − (−12a + 30c) − (−21a − 11c)
= −7a − 19c + 12a - 30c + 21a + 11c
= (-7a + 12a + 21a) + (11c - 19c - 30c)
= 26a - 38c
= 2(13a - 19c)
If you flip the coin 20 times it's mosts likely to land on heads 10 times
