Answer this question:Kendra tracks the different species of birds they spot on their birdwatching trip. On Monday they visited 5 sites and saw an average of 7 birds at each site. On Tuesday, Kendra visited 5 sites and saw an average of 5 birds at each site. On Wednesday visited 10 sites and saw an average of 8 birds at each site. On average, how many different birds did Kendra see on each site?
On Monday Kendra saw 5 sites x 7 birds / site = 35 different birds. On Tuesday Kendra saw 5 sites x 5 birds / site = 25 different birds. On Wednesday Kendra saw 10 sites x 8 birds / site = 80 different birds. In total Kendra saw 35 birds + 25 birds + 80 birds = 140 different birds. In total Kendra visited 5 sites + 5 sites + 10 sites = 20 sites. On average Kendra saw 140 birds / 20 sites = 7 different birds at each site.
The answer is 7.

Answer this question:The sum of Cooper’s, Dante’s, and Maria’s ages is 31. Dante is twice as old as Cooper. Maria is one year older than Dante. How old is Cooper?
Let X be the age of Cooper. So Dante is X * 2 years old and Maria is X * 2 + 1 year old. The sum of Cooper’s, Dante’s, and Maria’s ages is X + (X * 2) + (X * 2 + 1) = 31. Combining like terms, we get X * 5 + 1 = 31. Subtracting one from both sides, we get X * 5 = 30. Dividing both sides by 5, we get X = 6 years old.
The answer is 6.

Answer this question:Josh’s mom gives him $20 to go shopping at the mall. He buys a hat for $10 and a pencil for $2. Then he buys four cookies. If each cookie costs $1.25, how much money does Josh have left?
After buying a hat, Josh has $20 - $10 = $10. After buying a pencil, Josh has $10 - $2 = $8. The total cost of cookies is 4 * $1.25 = $5. After buying the cookies, Josh has $8 - $5 = $3.
The answer is 3.

Answer this question:There were 18 stamps in Parker’s scrapbook. If Addie put one fourth of her 72 stamps in Parker’s scrapbook, how many stamps does he have now?
Addie put 72 / 4 = 18 stamps in the scrapbook. Parker now has 18 + 18 = 36 stamps in his scrapbook.
The answer is 36.