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200002977
24.03.2021 •
Mathematics
When solving a system of equations, Jared found y=x+10 for one equation and substituted x + 10 for y in the other equation. Nicole found x=y-10 for x in the other equation. Who is correct? Explain.
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Ответ:
Both Jared and Nicole are correct.
Step-by-step explanation:
This is because since y = x + 10 is one equation, the equation Jared uses, he substitutes for y into the other equation.
On the other hand Nicole finds x = y - 10 in the other equation.
We can get Jared's equation from Nicole's equation by making y subject of the formula. So,
x = y - 10
So, y = x + 10 which is Jared's equation.
We can also get Nicole's equation from Jared's equation by making x subject of the formula. So,
y = x + 10
So, x = y - 10 which is Jared's equation.
Since from one equations, we can get the other, and both equations for x and y are the same from both equations, that is, from y = x + 10, we get x = y - 10 and, from x = y - 10, we get y = x + 10,both Nicole and Jared are correct
Ответ:
Both Jared and Nicole are correct. You can solve for either variable and use the equivalent expression to create a one-variable equation. Then you can solve. Jared would have created a one-variable equation that can be used to solve for x, whereas Nicole would have created a one-variable equation that can be used to solve for y.
Ответ:
3n=240
n = 80
Now, you can find 30% and 45% of n