02-11-2016
Mathematics

contestada

-x+2y=9
-7x-2y=-1
Solve each system by elimination

Respuesta :

03-11-2016

x - 2y = - 9
7x + 2y = 1

x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8

x = - 1

- 1 - 2y = - 9
2y = 8
y = 4

i am a mathematics teacher. if anything to ask please pm me

Answer Link

Otras preguntas

What is 25.2<1.5y+1.2

How to do 103,727,495 in expanded form

22.) -5n+3(6+7n) 23.) -2n-(9-10n) 24.) 10-5(9n-9)

In an examination there are four multiple choice questions with 3 options each, of which one option is the correct answer. In how many ways can a student answer

write 2,000,000,000 + 70,000,000 + 100,000 + 3,000 + 800 + 10 in standard form.

Solve for the variable X=5y for y

factor completely if the polynomial is not factorable write prime also state the methods used to factor the polynomial. 1. x^2-12x+36 2. r^3-81r 3. 35x^3y

A faction is an opposing group within a party. true or false?

Solve by completing the square X squared -6x+8=0

How do I convert negative 3 over 5 to a decimal