17,98 $ (subtraction)
Hope that helpful !
Answer:
4) 7a+20
5) 14+2b
6) 25c² - 15
Step-by-step explanation:
4) 9a+7-2a+13= 9a-2a+7+13 = 7a+20
5) 21-3b+5b-7= 21-7+5b-3b = 14+2b
6) (3c)² + (8c)² - 15 = 9c² + 16c² - 15 = 25c² - 15
Once they're empty, I guess.
Did you put it the wrong way around?
Because it would be after four hours in this case.
1/9 = 2/18 = 3/27 = 4/36 = 5/45 = ... = n/(9n) for any n
1/8 cup of sugar in each mufin
