Answer:
-55x=100
Step-by-step explanation:
5x-5(4x-8x)=100
5x-20x-40x=100
-55x=100
I believe the answer is 9
This is a combination problem. Order does not matter and the books are all different. You would write this as 21C5 or 
. Combinations are not fractions.
The answer is 
which = 20349 different ways these books can be chosen.
Answer:
The length is 7.50metres and the width is 5metres
Explanation:
Given the following
Length = 1.5Width
Perimeter = 25m
Required
Dimension of the room
Perimeter of the rectangular room = 2(L+W)
Since L = 1.5W
P = 2(1.5W+W)
P = 2(2.5W)
P = 5.0W
25 = 5W
W = 25/5
W = 5metres
Since L = 1.5W
L = 1.5*5
L = 7.5meters
The length is 7.50metres and the width is 5metres
He would need 5 1/4 cups of flour because 1 3/4*3/1 or 7/4*3/1 would equal
5 1/4
