Mathematics: (8th grade)Use the elimination method to solve the system. 4x+6y=10 2x+5y=1

(8th grade)Use the elimination method to solve

Ответ:

miarobless12389

13.02.2022

Mathematics

4x+6y=10

2x+5y=1

= 2x+y=9

2x=9-y -1

9-y+5y=1 ( using 1)

4y=1-9

y=-8/4

y=-2

2x=9-(-2)

2x=11

x=11/2

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Ответ:

kxngtj3

13.02.2022

Mathematics

Point form: (11/2, -2)
Equation form: x=11/2 y= -2

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Ответ:

elijahchloesunshine

27.09.2020

Mathematics

$(*)\qquad(a+b)^2=a^2+2ab+b^2\\\\x^2+12x=-11\\\\x^2+2(x)(6)=-11\qquad\text{add}\ 6^2\ \text{to both sides}\\\\\underbrace{x^2+2(x)(6)+6^2}_{(*)}=-11+6^2\\\\(x+6)^2=-11+36\\\\(x+6)^2=25\to x+6=\pm\sqrt{25}\\\\x+6=-5\ \vee\ x+6=5\qquad\text{subtract 6 from both sides}\\\\\boxed{x=-11\ \vee\ x=-1}$

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(8th grade)Use the elimination method to solve the system.
4x+6y=10
2x+5y=1

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