25-04-2018
Mathematics

contestada

Find the solution to the system of equations: 2x+y=12 7x−2y=31

Respuesta :

elliejl1016 elliejl1016

25-04-2018

x=5 and y=2
2x + y + -2x = 12 + -2x
y = -2x + 12
7x - 27 = 31 (we are substituting here for the y)
11x - 24 = 31
11x - 24 + 24 = 31 + 24
11x = 55
x = 5

y=-2x+12
y=(-2)(5)+12
y=2

Answer Link

Otras preguntas

What does the author suggest with the line “sometimes wondering, almost with envy”?

What is the value of y in the equation 2(3y + 6 + 3) = 196 − 16?

What percentage of diabetes patients have type 2?A. 5-10%B, 50-55%C, 75-80%D. 90 95%

A monotone speaker is one with little variation in ____________________. a. volume b. pitch c. rate d. articulation

A pH of 15.0 a. is not possible. b. is a base. c. is an acid. d. is a neutral.

A small group of friends that will ignore others, focusing only on themselves, is known as a. clique circle prejudice club

Which statement about signal phrases is true? (5 points) Signal phrases should be worded the same way throughout an informational text. Signal phrases are

For most people, how many alcoholic drinks does it take before judgment and physical reaction time are impaired?

Louis XIV appointed royal officials from the middle class to his bureaucracy because they helped to check the power of the nobles and Church. a. True b. False

Twenty years ago, you began investing $2,000 a year. Because your investments earned an average of 8 percent a year, your investment portfolio has a current dol