$21 because 3$x$7(numbers of days in a week)is $21. I hope this helps :)
Answer:
-21
28
Step-by-step explanation:
1) if r = -4
Substitute r = -4 in 3r - 9
= 3 * (-4) - 9
= -12 - 9
= -21
2) ( 4 / 7 ) * x = 16
4 * x = 16 * 7
x = 4 * 7
x = 28
Half the chance of landing tail once(1/2)
Half the chance of land tails four times (1/2 of 1/2 of 1/2 of 1/2)
1/16
It’s left 2 up 3
Thanks buddy thanks again
