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

The sum of three numbers is 69. If the second number is equal to the first diminished by 8, and the third number is 5 times the first. What are the numbers?

A sum of money is deposited at a bank at a rate of 12½ annum simple interest. In how many years would the deposited money be doubled

Explain What role did Walter Reed play in finding the cause of yellow fever?

Balance this equation (#7)

pls answer correctly

square root 2x = square root x+5

PLZ help me ASAP! ( I NEED HELP WITH PART C THE EXPLANATION)

HELLLPP PLZZZZ What set of transformations are applied to parallelogram ABCD to create A'B'C'D'? Reflected over the x-axis and rotated 180° Reflected over the y

PLEASE HELP ME THIS IS DUE TOMORROW/POR FAVOR AYUDAME ESTO ES DEBIDO MAÑANA!!!

based on the balanced equation: 2 K + Cl2 --> 2KCl what is the mole ratio of K to KCl