Answer:
Step-by-step explanation:
Distribute: 6(4-z) expands to 24-6z
24-6z=2z: Add 6z to both sides to get 24=8z
Divide both sides by 8: z=3
Answer: -4009
Step-by-step explanation: hope this helps!
Number of ways the second grade students can sit on the first row is 5! = 5P5
Number of ways 15 first grade students can sit in the remaining 20 seats is 20P15
Therefore, required number of ways is 5P5 * 20P15. (option B)
Answer:
- 3rs
Step-by-step explanation:
6rs — 7bc (-) 9rs — 7bc = 6rs - 7bc - 9rs - 7bc
=6rs - 9rs - 7bc - 7bc (collecting the like terms)
= - 3rs
