25 is composite because it is divisible by 5 and 25
Given:
You and your friend each purchase an equal number n of magazines.
Your magazines cost = $1.50 each
Your friend's magazines cost = $2 each
Total cost = $10.50
To find:
The equation to find number of magazines you purchased.
Solution:
Your magazines cost = $1.50 each
Your friend's magazines cost = $2 each
Number of magazines purchased by you and your friend = n
Total cost = 
It is given that total cost is $10.50.


Divide both sides by 3.50.


Therefore, required equation is
and the number of magazines purchased by you is 3.
Step-by-step explanation:
hope I understand your qyestion
Equation 1 : R+G=20
Equation 2 : 7R+3G=9
Multiply Equation by 3, it becomes
3R+3G=60 ...... Equation 3
Now Equation 3 minus Equation 2
-4R = 51
R = - 51/4
Sub R into Equation 1, you can find G
9514 1404 393
Answer:
Step-by-step explanation:
What to do:
- read the question
- do what it says
__
When you plot 3 points, A, B, C, you can join them 3 ways: AB, AC, BC. The three line segments make a triangle