Joyeria28 Joyeria28

21-04-2015
Mathematics

contestada

Hello, I need help solving the system of equations by substitution method.

Thanks,

4x+2y=108
x=-5y

Respuesta :

Crinckle Crinckle

21-04-2015

4(-5y) + 2y = 180

-20y + 2y = 180

-18y = 180

y = -10
x = 50

Answer Link

Panoyin Panoyin

21-04-2015

4x + 2y = 108
x = -5y

4(-5y) + 2y = 108
-20y + 2y = 108
-18x = 108
-18    -18
   x = 6
4(6) + 2y = 108
24 + 2y = 108
- 24    - 24
   2y = 84
      2 2
   y = 41
      (x, y) = (6, 41)

Answer Link

Otras preguntas

for a circle of radius 4 with center (-4, 3). in general form

How do us measure volume in science e.g if something is 14ml What is that in cm3 thanks

what is an ad hom attack?

How do I factor x^2+7×+6

How do us measure volume in science e.g if something is 14ml What is that in cm3 thanks

Where is a trench most likely to occur? A. transform plate boundary between continental plates B. divergent plate boundary in a continental plate

Rationalise:(1) 4/(2+root3+root7)(2) 4/(2root3+root5)

Gilda walks to the train station. If she walks at the rate of 3 mph, she misses her train by 7 minutes. However, if she walks at the rate of 4 mph, she reaches

An investment club invested part of $8000 at 10% annual interest the rest at 12%. If the annual income from these investments is $900, how much was invested at

why it is that evaporation causes cooling,but boiling causes heating?