Answer:
angle 1=58
angle 4=122
Step-by-step explanation:
180-122=58
180-58=122
because all straight lines= 180
Answer:
56/3
Step-by-step explanation:
6x-54=3x+2
3x-54=2
3x=56
x=56/3
Answer:140
Step-by-step explanation:
24/20=168/N
Cross product
24×n=168×20
24n=3360
n=3360/24
n=140
Answer:
5) 15120
6) 11880
7) 336
Step-by-step explanation:
The formula for permutation where mPn is m!/(m-n)!
Applying this to question 5, we get 9!/4!, which is 15120.
For question 6, we get 12!/8!, which is 11880.
For question 7, we get 8!/5!, which is 336.
