Answer:
The sum of the first five classroom numbers in a row is 5k + 20
Step-by-step explanation:
Since the smallest classroom number on the side of the building is numbered k and each consecutive odd integer is separated by a difference of
2.
Therefore:
k is the first class room.
k + 2 is the second class room.
k + 4 is the third class room.
k + 6 is the third class room.
k + 8 is the fifth class room.
The sum of the five consecutive class rooms are given as:
k + (k + 2) + (k + 4) + (k + 6) + (k + 8)
collecting alike terms we get
= k + k + k + k + k + 2 + 4 + 6 + 8
= 5k + 20
Therefore, The sum of the first five classroom numbers in a row is 5k + 20.
Answer:
300
Step-by-step explanation:
2252÷7≈2250÷7
≈300
Toby equals 20 dollars and Mark equals 32 dollars. We need to find a number that is both divisible by 32 and 20.
Table A:20, 40, 60, 80, 100, 120, 140, 160
Table B:32, 64, 96, 128, 160.
Both numbers have 160, so find how much of what goes into it. 8 paintings from Toby and 5 from Mark.
If 1/5 of an apple is consumed in three days, we would do 3 x 5, which would give us 15. That means it takes 15 days for the ant farm to consume 1 apple. Times that by three, and it takes an ant farm 45 days to consume 3 apples.