45n+15
Factor out 15 from the expression
15(3n+1)
Answer:
Step-by-step explanation:
9. Correct, D
-3Y + 9X <= 12
3Y - 9X => -12
3Y => -12 + 9X
Y => -4 + 3X
10. D
11. D
12. Correct, B
13. Correct, E
14. A
15. B
Answer:
Step-by-step explanation:
You can use this by multiplying what needs to be multiplied and eliminate what isn't needed.
Answer:16
Step-by-step explanation:The lines that are outside of the numbers keep the numbers positive so if you change them to positive number (15+1) you can add them and it gives you 16
Answer:
C. Correct, because for the work to be carried out in 5 days, 40 workers are required.
Step-by-step explanation:
The job requires 10 people to work for 20 days. That's 200 worker-days.
In other words,
days × workers = 200 or
workers = 200/days
To get the work done in five days,
workers = 200/5 = 40.
You must hire 40 workers.
B. and D. are wrong. To get the job done in seven days. you must hire 200/7 = 29 workers.
