anaidvilla121 anaidvilla121

13-01-2019
Mathematics

contestada

What’s The elimination 7x+4y=-4 5x+8y=28

Respuesta :

mathecoach mathecoach

13-01-2019

Answer:

7x + 4y = -4

5x + 8y = 28

II - 2*I

- 9·x = 36 --> x = -4

7*(-4) + 4y = -4 --> y = 6

Answer Link

Otras preguntas

Which wireless communication technology is short-range and intended to replace the cables connecting portable or fixed devices while maintaining high levels of

Need help please!!!!!

There are two different isotopes of bromine atoms. under normal conditions, elemental bromine consists of br2 molecules, and the mass of a br2 molecule is the s

There are two different isotopes of bromine atoms. under normal conditions, elemental bromine consists of br2 molecules, and the mass of a br2 molecule is the s

Why was the social structure of Europe challenged by the growing number of free townspeople and the changing economy

verbal expression for 7^8

The length of a rectangle is (3x − 5) inches, and its width is 2x inches. Find the area of the rectangle. Hint: Area of a rectangle = length × width.

You want to have $35,000 in cash to buy a car 4 years from today. you expect to earn 8 percent, compounded annually, on your savings. how much do you need to de

Which of the statements below are true? Choose all that apply. A. Insects are rarely important to the health of forest ecosystems. B. People's activiti

What element is responsible for the color change in the benedictâs test?