odelllinkin2002 odelllinkin2002

01-11-2017
Mathematics

contestada

3x+5y=2 and 9x+11y=14 equals

Respuesta :

choixongdong choixongdong

01-11-2017

3x+5y=2 (1)
9x+11y=14 (2)

multiply equation (1) by 3
9x + 15y = 6

so
9x + 15y = 6 (1')
9x + 11y =14 (2)
-------------------------subtract
4y = -8
y = -2

3x+5y =2
3x+5(-2) =2
3x - 10 = 2
3x = 12
x = 4

answer
(4, -2)

Answer Link

Otras preguntas

Which values of P and Qresult in an equation with no solutions? -60x+32=Qx+P

I need help answering these, I am not the best at Spanish and really need help

[tex]\sum _{n=0}^{\infty \:}\frac{\left(-1\right)^n\arctan \left(n\right)}{n^2}[/tex] Please Help.

In the 1870s, groups of women begin merging from church meetings to nearby salons. Then up in prayer on the saloons four or on the street to block the entrance.

Sam buys a lamp during the sale there was a discount of 20% if the original prices is $4 what is the sales price

Which number shows 6,312 rounded to the nearest ten? 6,300 6,310 6,320 6,330

What was the initial purpose of the constitutional convention of 1787?, what areas did they agree? what areas did they not agree? how did they resolve their dif

The terms of the treaty of Ghent was all boundaries were restored to their pre-war locations and the two nations agreed to stop fighting. A.true B.false

The length of a rectangle is 3 times its width. Write and evaluate an expression for the length of the rectangle.

Which excerpt from chapter 1 of Animal Farm is an example of direct characterization?