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

Sarah was 50 1/4 inches tall when she was 12 years old. she was 48 1/2 inches tall when she was 11. how much did she grow during the year?

In triangle OPQ, the measure of angle Q=90°, OQ=33, PO= 65, and QP= 56. What ratio represents the tangent of angle P?

21 shirts = $147 and 22 shirts =$154 and 23 shirts = $161 then how much does 30 shirts cost and how much does 9 shirts cost to

a bicycle and its rider together have a mass of 80 kg. if the bicycle's speed is 6m/s, how much force is needed to bring it to a stop in 4 seconds.

Ken went to a country fair and spent $5 on admission, $6. 50 on games, and $7. 21 on food. If he had $30 before he went to the fair, how much money does he have

What is the solution set of the following system of equations? y=3x+6 y=(x+4)^(2)-10 The solution tothe system is at (-5,-9). The solutjon to the system is at (

What is the total pressure exerted by a mixture containing 2 gasses if the partial pressure of one gas is 70kpa and the partial pressure of the other gas is 30k

8. What is the force of attraction between a 20,000 kg truck and a 3,200 kg car when separated by 4 meters? a. 0.0003 N b. 0.5 N c. 9.8 m/s/s d. 10 N

- Stonehenge, a circle of large carved stones in England, was built more than 1,000 years ago. The circle of stones has a diameter of 108 feet. What is the circ

A water tower 30 m tall is located at the top of a hill. From a distance of D = 120 m down the hill it is observed that the angle formed between the top and bas