03-04-2017
Mathematics

contestada

2x+5y=60
2x-5y=-20

Please show work!

Respuesta :

Goalinetsky Goalinetsky

03-04-2017

(2x+5y=60)
- (2x-5y=-20)
-------------------
10y=80
y=8

2x+5(8)=60
2x+40=60
2x=20
x=10

Answer Link

Otras preguntas

What unit is used to express the pressure of a gas?(1) mole (2) joule (3) kelvin (4) pascal

Recovering the salt from a mixture of salt and water could bestbe accomplished by(1) evaporation(2) filtration(3) paper chromatography(4) density determination

People express thoughts mainly by using what? A. pictures. B. numbers. C. language. D. gestures.

The wave-mechanical model of the atom is required to explain the (1) mass number and atomic number of an atom (2) organization of atoms in a crystal (3) radioac

Opium war taiping rebellion and boxer rebellion is most closely associated with

When a voltaic cell operates, ions move through the(1) anode (2) cathode (3) salt bridge (4) external circuit

What is a main cause of a virus on a computer

According to Reference Table N, which pair of isotopes spontaneously decays? (1) C-12 and N-14 (3) C-14 and N-14 (2) C-12 and N-16 (4) C-14 and N-16

solve for x: log6(x+29) - log6(x-6) = 2

find the surface area of the open circular cylinder shower=4 h= 7