8x +9 = 6x + 21 where x = number of chairs in each row
2x=12
x=6
sub back into original equation 8 x 6 + 9 =57 chairs
11. 1/81
12. 1/512
13. 1/81
14. 1/125
17. 1/72
18. 189/625
Answer:
There are no solutions.
Step-by-step explanation:
5x-5=5(x+1)
5x-5=5x+5
+5 +5
5x=5x+10
-5x -5x
0x=10
There are no possible answers.
Hopefully this helps.
There are 13 girls and 4 more students that are boys that made an A grade. Thus there are 13+4=17 students that are either girls or A students.
The probability of choosing a girl or A student is 17/30.
Answer:
1/1024
Step-by-step explanation:
1/(4*4*4*4*4)
1/1024