Please help asap in 15 mintues !!!!
2 answers:
You might be interested in
Explanation : x = 79 marks
The marks scored by Mike on four math test are 88,91,75 and 72.
Average of marks, A = 81
Let in fifth test he scores x marks.
The formula for finding average is :
In the fifth test he scores 79 marks.
Hence, this is the required solution.
Answer:
As the Figures progress, you can see that the salt dissolves. Through Figure (a), the salt is more compact and has not dissolved, therefore, the molecules are close intact. From Figure (b), the water is starting to dissolve the salt. Here, the the salt begins to spread throughout the water which will form salt water. And lastly, through Figure (c), the water has fully dissolved the salt. The salt molecules are all spread and have combined with the .