Answer:
Step-by-step explanation:
You are going to choose 4 books in any order.
Four = 12! /(8!4!) Remember that order doesn't matter, so we have 12C4
495
Answer:
90m
Step-by-step explanation:
AB = 18m
BC = AB + 9 = 18 + 9 = 27m
Perimeter = 2(AB + BC)
= 2( 18 + 27)
= 2 x 45
= 90m
Answer:4
Step-by-step explanation:
2x-6=14
2x=8
x=4
Answer:
B
Step-by-step explanation:
7m+11= -4 x 2m + (-4 x 3)
7m +11 = -8m -12
7m +8m = -12-11
15m = -23
Y = kx
72 = k*3
73/3 = k
24 = k
y = 24x
