Answer:
I hope you did well
Step-by-step explanation:
I noticed that it was uploaded an hour ago, I hope it worked out for you
Answer:
15
Step-by-step explanation:
Try 1, 2, 3, or 4 blue pencils. Then green is 6 times as many. Red must be the rest to make up 20 total.
No. of blue No. of green No. of red
1 6 13
2 12 6
3 18 -1
You can't have 3 blue pencils because 3 blue + 18 green = 21 pencils, and there are only 20.
If you have 1 blue and 6 green, then there must be 13 red, but red must be less than green, and 13 is not less than 6.
The only possibility is
2 blue, 12 green, 6 red
If you start taking out pencils, when you take out the first 14 they may be all blues or green, so only when you take out the 15th pencil do you know for sure there must be 1 green pencil.
Step-by-step explanation:
I'm really really sorry if I'm wrong...
3(y-9)=5y+2
3y - 27 = 5y + 2
+ 27 + 27
3y = 5y + 29
-5y -5y
-2y = 29
-2 -2
y = -14.5
Answer: 15A-6
Step-by-step explanation:
put 7a and 8a together and leave -6