Answer: b = 4f
Step-by-step explanation:
Since every flashlight needs 4 batteries, every flashlight added (f) will be 4 more batteries needed total (b). With this information in mind, we can write the equation:
b = 4f
9 students, 4 are selected and order doesn't matter:
Go to the 9th row of the triangle (mind you the first row is 0), the 2nd is 1st row
9th row: 1 9 36 84 126 126 84 36 9 1
Now choose the 4th column (excluding the 1st , you will get 126 :
so 126 is the number of combination requested:
PROOF: ⁹C₄ = 9!/(9-4)! .4! = (9!)/5!.4! = 126
Answer:
22 fish
Step-by-step explanation:
cella has 12 fish. micheal has ten more 12+10=22. combind 22+12=34
Answer:
35000
Step-by-step explanation:
1) Add up 30000+30000+35000+40000+40000
2) Divide that total by 5 (the number of items you added together in the first step)
3) You get 35000
