In 880, the first 8 represents a value ten times larger than the second 8. That is the first relationship between the two 8’s. The second relationship is that swapping the two 8’s does not change the number. Because the hundreds and tens places hold the same digit here, exchanging them leaves the overall number unchanged.
F(x) = 1,000. 70n - 400 = 1,000. 70n = 1,000 + 400. 70n = 1,400. n = 1,400/70. n = 20. The instructor requires 20 students.
Answer:
together they rake
leaves in one minute.
Step-by-step explanation:
If Maya takes x minutes to rake, then in one minute, she rakes
leaves.
For Carla, if her raking takes y minutes, in one minute she rakes
leaves.
Thus, to find the amount they work together in one minute, we add both of their contributions for that minute, resulting in: 
Finally, simplifying this expression gives:

As a result, they collectively rake
leaves in a minute.
P(volleyball and baseball) = 4/200 x 100 = 2%
P(volleyball or baseball) = P(volleyball ∪ baseball) = P(volleyball) + P(baseball) - P(volleyball and baseball) = 12% + 15% - 2% = 25%.
Thus, 25% of students participate in either volleyball or baseball.
I believe this is correct