The system of equation that has one solution is: (d) –2x+ 7y = –5 and 2x +7y = –9
<h3>What are systems of equations?</h3>
This is a group of equations which may have none, one or more solutions.
From the list of given options, the system of equations that has one solution is:
–2x+ 7y = –5 and 2x +7y = –9
This is so because, the solution is (-1,-1)
However, the other systems have infinite many solutions
Read more about system of equations at:
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A = 65 B = 40
because you can set it up as 13x-8x=25 this turns to 5x=25 and that turns to x=5 so you get 13*5=a and 8*5=b so a=65 and b=40
We know that one inch has 16.5 turns.
To know the number of turns in 2.5 inches of thread, we will simply do a cross multiplication as follows:
number of turns = (2.5 x 16.5) / 1 = 41.25 turns
Answer: 3xy = 1. Example 2: Simplify 7a + 5b - 6b + 8a 2b = 0. Solution: Step 1: group together the like terms