JeremiahO JeremiahO

21-07-2017
Mathematics

contestada

2x+3y=-5
3x-5y=21

The value of y that satisfies the system of the equations above is
A) 2
B)7
C) -3
D)There is no solution

Respuesta :

scarletblades101 scarletblades101

21-07-2017

You have to find a way to eliminate either x and y. We'll eliminate x:

2x + 3y = -5
3x - 5y = 21

2x*3 + 3y*3 = -5*3
3x*-2 + -5y*-2 = 21*-2

6x + 9y = -15
-6x + 10y = -42

19y = -57

y = -3

Answer Link

Otras preguntas

Solve for z in terms of v, w, x, and y. vy = -ZWx Z = I

What is the first step when rewriting y = 6x2 + 18x + 14 in the form y = a(x – h)2 + k?

Ezra jogged 5 kilometers in 5/12 of an hour. How fast was he jogging?

What are the six elements to focus on when listening to music?

Convert 99 degrees Fahrenheit to celsuis

If an object placed at 5m undergoes a displacement of -12m, where does it end up?

PLZ HELP QUICK TO HELP SOLVE THIS

What is potentially problematic about using religious symbols in advertisements?

A baseball player swings his bat and hits a ball. According to Newton’s third law of motion which of the following is a reaction to the bats force on the ball?

Scientific models ___. A. Are based on a set of observations B. Are used to replace experiments C. Allow the study of existing systems only D. Are rarely used.