th3lastsh3riff th3lastsh3riff

14-11-2018
Mathematics

contestada

2x + 5y= 18 4x + 20y= -36 Solve and Explain first to get right gets brainliest

Respuesta :

wghitustl wghitustl

14-11-2018

because 4x+20y=-36,so ( 4x+20y)/2=2x+10y=-18

(2x+10y)-(2x+5y)=-18-18

5y=-36

then y=-7.2

because 2x=18-5y

so x=(18-5y)/2=(18-5*(-7.2)）/2=27

Answer Link

Otras preguntas

If a 35 ft rope is cut into two sections with one section 6 times as long as the other section, how long is the shorter piece?

If a store credit account charges 1.5% interest each month, what is the APR?

Choose the right variant 1 This book will take to years to write. A. After two years I'll write this book B. In two years time I'll have written this book C . A

Helen Grey By Christina Georgina Rossetti Because one loves you, Helen Grey, Is that a reason you should pout, And like a March wind veer about, And frown, and

Choose the right variant 1 This book will take to years to write. A. After two years I'll write this book B. In two years time I'll have written this book C . A

let f(x)=x^2 - 16. find f^-1(x).

Which choice is equivalent to the expression below? 5x sqrt 2 - 2 sqrt 2 + 2x sqrt 2 A. 7x sqrt 2 - 2 sqrt 2 B. 2x^2 sqrt 2 C. 3x sqrt 2 D. 7x^2 sqrt 2

let f(x)=x+8 and g(x)=x^2 -6x-7. find f(g(2))

Choose the right variant 1 This book will take to years to write. A. After two years I'll write this book B. In two years time I'll have written this book C . A

7.25 times 8 1/2= what?