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aletadaboss
07.01.2020 •
Mathematics
Solve the system of equations. write your answers in a list of ordered pairs, separated by commas.
{x2+y2=65
x2−3y=37
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Ответ:
X2-3y=372
÷both equation. 1 by 2
X+y=32,5
X=32,5-y 3
Sub 3 in 2
(32,5-y)2-3y=37
65-2y-3y=37
65-5y=37
-5y=37-65
-5y= - 28 divide both sides by - 5
Y=5,6 4
Sub 4 in 3
x=32,5-y
=32,5-5,6
=26,9
Hope it's the way you wanted it
Ответ:
20.00 - 1.25 =18.75
18.75-14.39= 4.36
the drink cost $4.36