reneewilliams20
01.04.2021 •
Mathematics
Solve the following system of equations: {−6x−y=2−7x−4y=−9
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Ответ:
x=-1, y=4. (-1, 4).
Step-by-step explanation:
-6x-y=2
-7x-4y=-9
y=-6x-2
-7x-4(-6x-2)=-9
-7x+24x+8=-9
17x=-9-8
17x=-17
x=-17/17
x=-1
-6(-1)-y=2
6-y=2
y=6-2=4
Ответ:
d = 50^r = 25 A = 2
A = (25)2
A = (3.14)(625) A = 1,962.5