snashellbrietos snashellbrietos

29-09-2016
Mathematics

contestada

If x² - y² = 55, and x - y = 11, then y =

A. 8
B. 5
C. 3
D. -8
E. -3

Respuesta :

Hussain514 Hussain514

30-09-2016

If x-y = 11
then y = x-11
x²-(x-11)² =55
x²-(x²-22x+121) = 55
22x - 121 = 55
22x = 176
x =8
y = x-11
y = 8-11
y = -3.
e is right option
hope this helps

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