SJMHeat SJMHeat

08-09-2017
Mathematics

contestada

How do I solve this?

How do I solve this class=

Respuesta :

kphung76127 kphung76127

08-09-2017

Multiply the first equation by 2
4x-6y=16

Then add the equations to eliminate x
4x-6y=16
-4x+5y=-10

-y=6
y-=6

Plug the y value in
2x-3(-6)=8
2x+18=8
2x=-10
x=-5

Final answer: (-5,-6)

Answer Link

08-09-2017

2x -3y = 8 ---> y = 2/3x +-8/3

-4x +5(2/3x + -8/3) = -10
-4x + 10/3x + -40/3 = -10
-2/3x + -40/3 = -10
plus 40/3 on both side = -2/3x = 10/3
multiply both side by 3/-2 = -5

x = -5 y = -6

y = sub x into orginal equation

Answer Link

Otras preguntas

One number is 2 more than another. The difference between their squares is 32. What are the numbers

Vera’s resumé shows how ____________ she is. She has worked successfully as a business manager, kindergarten teacher, professional artist, copywriter, and sales

Which of the following is not included in the manufacturing industry cluster? Select the best answer choice. Apparel Manufacturing Printing Oil refinery Textile

Why should you place a cover slip over your specimen at a 45 degree angle when making a wet mount slide?

________ are a useful indicator of a firm’s value. Stock prices Cash flow analyses Profits Executive compensation packages

This quote is an example of a metaphor. Explain why. “This whole earth which we inhabit is but a point in space.”

what are the differences between a prokaryotic and Eukaryotic? and what are their functions?

A scientist observes how a particular South American bird cares for its young. Why is a field study an appropriate type of scientific investigation? A. It

If x = 4, y = 2 and z = 1 then xz (4y - 2z) is

sadie bought 4 packages of napkins and 2 packages of cups. which item had more in each package? how many more? Sadie's Party Supplies item Number Plate