MPSLondon
02.10.2019 •
Mathematics
Kate and john ran a marathon, a distance of 26.2 miles. kate's time was 4 hours, 36 minutes. john's time was 4.6 hours. compare their running rates. explain your reasoning.
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Ответ:
Ответ:
x = -
y = 2
Step-by-step explanation:
When given the following system:
y = 3x + 4
y + 6x = 3x
Use inverse operations so that both equations are solve for one variable,
y = 3x + 4
y = -3x
Add the systems so that one of the variables (x) cancels, this process is called the process of elimination;
y = 3x + 4
y = -3x
_________
2y = 4
Inverse operations,
2y = 4
y = 2
Now backsolve, find the value of (x) by substituting the value of (y) into the equation:
y = -3x
2 = -3x
x = -