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

How do the energy and the most probable location of an electron in the third shell of an atom compare to the energy and the most probable location of an electro

Which statement describes a chemical property of iron?(1) Iron can be flattened into sheets.(2) Iron conducts electricity and heat.(3) Iron combines with oxygen

A compound has a gram formula mass of 56 grams per mole. What is the molecular formula for this compound? (1) CH2 (3) C3H6 (2) C2H4 (4) C4H8

Which book is recorded as the tallest in the Library of Congress?

Which nuclear emission has the greatest penetrating power? (1) alpha particle (3) gamma radiation (2) beta particle (4) positron

Which sample contains particles in a rigid, fixed, geometric pattern?(1) CO2(aq) (3) H2O(ℓ)(2) HCl(g) (4) KCl(s)

Mustafa is an excellent long-distance runner, and the race was won by him last weekend. Which is the best way to write this sentence in the active voice? Mustaf

How is a franchise “an almost independent” business?

to determine the speed of an object,divide distance by acceleration?? true or false explain please i need help!!!!!!!!!!!!!!!!!!!!!!

Mustafa is an excellent long-distance runner, and the race was won by him last weekend. Which is the best way to write this sentence in the active voice? Mustaf