02-11-2017
Mathematics

contestada

Elimination
4x+5y=-15
-3x-2y=13

Respuesta :

Dreamer4102001 Dreamer4102001

04-11-2017

multiply the first equation by 3 and tge second by 4:
12x+15y=-45
-12x-8y=52
then add the equations:
0x+7y=7
7y=7
y=1
so 4x+5(1)=-15
4x+5=-15
4x=-20
x=-5

Answer Link

Otras preguntas

-5y + 3x = 3 -8y + 9x = -12 solve for x and y

15x + 31y = -3 X= -y +3

What did the Emancipation Proclamation claim to do? A. free slaves to Border states B. outlaw slavery C. free all slaves D. free slaves in Confederate states

The dye dilution method is used to measure cardiac output with 3 mg of dye. The dye concentrations, in mg/L, are modeled by c(t) = 20te−0.6t, 0 ≤ t ≤ 10, where

Someone wants to dig for fossils. They go to school and specialize in geology. What subcategory would they be interested in?

If f (x) = 3x+2, what is f(a+ 2)?

Vanillin, C8H8O3, is the active ingredient in vanilla flavoring. It contains a six-membered aromatic ring with an aldehyde group on carbon 1, an alkoxy group (e

What is referred to as two or more people who share some common characteristic that is socially meaningful for themselves and others?

how can two different historians come up with different versions of the past

My home is two blocks from school, one block from a shopping center, and one mile from work. The geographic term that describes this is: