583hks8to6o9 583hks8to6o9

03-04-2019
Mathematics

contestada

2x+5y=20. , -2x+20y=-90. one solution. infinity many ir no solution. use elimination to find your answer

Respuesta :

03-04-2019

2x+5y=20
X=10-2.5y

-2(10-2.5y)+20y=-90
-20+5y+20y=-90
25y=-70
Y=2.8

2(2.8)+5y=20

5.6+5y=20
5y=14.4
Y=2.88

CHECK:
2(2.8)+5(2.88)=20

Ver imagen xAJHx

Answer Link

Otras preguntas

How many planes exist that pass through points A, B, and C? 0 1 2 3

What’s the answer????

what was the Townshend Act?

slove the system of equations 3x-7y=5 and 9y=5x+5

the difference of a number and twice another number is 12. The sum of the two numbers is -27. What are the two numbers?

Mr. Sam took 1 h 15 min to drive from his home to office. If the distance between his home and office was 50 miles, at what average speed did Mr. Sam drive? _

Why did colonists come to Jamestown originally? A. To farm tobacco B. To promote religious tolerance C. To search for gold D. To escape religi

The founder of american odontology as a means of identification of the dead is

What is the approximate surface area of a sphere with a circumference of 37.68

whats the capital of california sacramento is the capital