3(10 - x) = 21
30 -
21
30 - 3x
= 21
- 3x
- 3x
-9
=
X =

Step-by-step explanation:

I am answering blanks left to right and top to bottom.

3x

30 30

-9

-3 -3

x = 3

1/8

Step-by-step explanation:

There are 4 possible outcomes when you spin the spinner once, and 4 * 4 = 16 possible outcomes when you spin the spinner twice. There is 1 way to spin a 6 and then 2 ways to spin a number greater than 5 (these numbers are 6 and 7), hence, there are 1 * 2 = 2 ways to land on a 6 and then land on a number greater than 5. Since probability = successful outcomes / total outcomes, our answer will be 2 / 16 = 1/8.