tamyaharris tamyaharris
  • 11-02-2021
  • Mathematics
contestada

Solve the following systems of equations without graphing
5x + 10y = 30
-5x +15y = 20

Respuesta :

bradleyspengeman
bradleyspengeman bradleyspengeman
  • 11-02-2021

Answer:

(2, 2)

Step-by-step explanation:

In this case, elimination would be the most efficient means of solving.

Simply, add the two equations, and you will be left with only one variable to solve for. (In this case y) You are then able to take your solution and plug it into an equation and solve for x, therefore giving you their intercept.\

5x + 10y = 30

+

-5x + 15y = 20

(x's cancel) 25y = 50

25y = 50

y = 2

5x + 10(2) = 30

5x + 20 = 30

5x = 10

x = 2

The solution to this equation is (2, 2)

Answer Link

Otras preguntas

What is the Exigence in the Maze Runner film?
What is the slope of the line that passes through the points (-2,9) and (8,34)? Write your answer in simplest form.
help please, i only have 10 mins
The function y = f (x) is linear. Given f-¹ (0) = 3 and f (1) = - 4, find the formula of f (x) and f-¹ (x)​
A student has 1/4 of a glue stick but has 6 craft projects what fraction of the original glue stick can be used on each progect.
(6p+5) (6p-5) find this using algebric identities
Questions Your brother is on the phone making plans for the evening and you can only hear his answers. Write the questions his friend asks based on the answers.
Please help, I am so confused. If anyone understands this please help
does anyone know how to answer question 7?
HELPPPPPPP PLEASEEEEE !!!!