To solve for any given number of variables, you need that number of equations to solve for all variables. When there are only two variables you only need to equations to solve for them both. You eliminate one variable at a time, order does not matter.
y-x=6 and y+x=-10
Since one equation has -x and the other +x, you can simply add the two equations together to eliminate x...
(y-x=6)+(y+x=-10)
y+y-x+x=6-10
2y=-4
y=-2, now you can use this value of y in either original equation to solve for x...
y-x=6, using y=-2 becomes:
-2-x=6
-x=8
x=-8
So the solution to the system of equations is the point (-8, -2)
You can always check by using these two values in the original equations...
y-x=6, -2--8=6, -2+8=6, 6=6
y+x=-10, -2+(-8)=-10, -2-8=-10, -10=-10
I have the problem written out (in the picture below) but tell me if it is unclear and I will better explain it to you!
Answer:
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Step-by-step explanation:
13/15 = 86%
17/20 = 85%
turn the scores into percentage and you will get the answer
The answer you are looking for is 1.
When you divide a fraction by another fraction, you flip the second one (make it the reciplical) and multiply straight across. 1/2 * 2/1 = 2/2, which simplified (divided by 2/2) is 1.
I hope this helps!
Answer:
I have no idea
Step-by-step explanation:
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