Answer:
x = 12
Step-by-step explanation:
Step 1: Add 9 to both sides.
Step 2: Divide both sides by 7.
Step 3: Check if solution is correct.
Therefore, x = 12.
This is a problem of permutation. In mathematics, the permutation relates to the fact of arranging all the member of a set into order. So, the k permutations of n are the different ordered arrangements of a k element subset of a n set. In the problem above k = 9 are the elements which are all the numerals available. On the other hand, n set is equal to 4. So, the formula of such k-permutations of n is given by:
Solving for k = 9 and n = 4:
Answer:
13.79%
Step-by-step explanation:
A solution is made by dissolving 24 millimeters of saline in 150 millimeters of pure solution
Therefore percent of saline in the pure solution can be calculated as follows
= 24/24+150 × 100
= 24/174 ×100
= 0.1379 ×100
= 13.79%
Hence the percent of saline in the pure solution is 13.79%