Answer:
x = 3, y = 8
Step-by-step explanation:
by substitution
4x + (x+5) = 20
5x + 5 = 20
x = 3
y = x + 5 = 3 + 5 = 8
Hello,
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First you eliminate the 2y and -2y since they cancel each other out then you add the 6x+5x and 14+8, then you are left with 11x=22, then divide both sides by 11 leaving you with x=11, hope this helps!
You can always match 4 points using a cubic polynomial. A graphing calculator can find a cubic regression equation for you. This set of points is matched by
.. y = x^3 +3x^2 +5x +3