Answer: 3.4 h
Explanation:
1) The basis to solve this kind of problems is that the speed of working together is equal to the sum of the individual speeds.
This is: speed of doing the project together = speed of Cody working alone + speed of Kaitlyin working alone.
2) Speed of Cody
Cody can complete the project in 8 hours => 1 project / 8 h
3) Speed of Kaitlyn
Kaitlyn can complete the project in 6 houres => 1 project / 6 h
4) Speed working together:
1 / 8 + 1 / 6 = [6 + 8] / (6*8 = 14 / 48 = 7 / 24
7/24 is the velocity or working together meaning that they can complete 7 projects in 24 hours.
Then, the time to complete the entire project is the inverse: 24 hours / 7 projects ≈ 3.4 hours / project.Meaning 3.4 hours to complete the project.
Answer:
C. Because (-3)^2 is NOT equal to -9
Step-by-step explanation:
Answer:
x=1 or -1/2
Step-by-step explanation:
The value of x is 1 or -1/2
4 twos and 4 Jack's 4+4=8. 8/52=4/26=2/13
2/13 is the simplest form
Answer:
x=y+3
Step-by-step explanation:
you just swap variables.
