xandermdel xandermdel

03-04-2020
Mathematics

contestada

a solution of a system of linear equations

x - y = 5
- 3 x + y = - 1

Respuesta :

ghanami ghanami

05-04-2020

Answer:

one solution : (-2 ; -7)

Step-by-step explanation:

hello :

x - y = 5 ....(*)

- 3 x + y = - 1 ....(**)

by (*) : y=x-5

by(**) : y = 3x-1

3x-1 = x -5

3x-x=-5+1

2x= -4

x= -2

but : y = x-5 so : y= -2-5=-7

one solution : (-2 ; -7)

Answer Link

Otras preguntas

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid (HCOOH) requires 29.80 mL of 0.1567 mol

2 cars are 200 km apart and then drive towards each other, one at a speed of 40 km/hr and the other at a speed pf 100 km/hr. how much time till they meet?

2) Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children. Fi

While a gas does 855 J of work on its surroundings, 1800 J of heat is added to the gas. Does the internal energy of the gas increase or decrease, and by how mu

Indicators, recorders, and alarms all display the current values of process variables.a) Trueb) False

5 in Find the perimeter. 10 in P = [?] in

This is a problem that is much larger than the Equifax incident. There has been a large uprise in consumer data breaches and identity theft within the past deca

The graph of an exponential model in the form y = a ⋅ bx passes through the points (3, 5) and (4, 10). Which point is also on the graph? A. (2, 0) B. (2, 1)

Creating a title and labeling the axes are two things you must do when making a A. chart B. graph C. map D. illustration

A family spends $45,000 on living expenses. with an annual inflation rate of 9%, they can expect to spend approximately __________ in one yeaA. 50,045B. 46,045C