contestada





Given the system:

3x + 6y = 18

2x + y = 12

Which variable, in which equation, would you solve for first to use the Substitution Method?

Question 1 options:

Solve the 1st equation for x.


Solve the 1st equation for y.


Solve the 2nd equation for x.


Solve the 2nd equation for y.


Using the Substitution Method, what would be the first step to solve the given system?

x = 2 - y

3x + 4y = 20

Question 2 options:

Solve the 1st equation for x.


Substitute 2 - y in for x in the 2nd equation.


Graph the two equations


Substitute 2 in for y.

Given the work as shown for solving the system, what will be the value of y in the solution?

Question 3 options:

y = 0


y = 5


y = 25


y = 35

please help me!!

Given the system 3x 6y 18 2x y 12 Which variable in which equation would you solve for first to use the Substitution Method Question 1 options Solve the 1st equ class=

Respuesta :

rnashed
Question 1:
It's mostly a preference problem. You can do any of those options and still be correct. The easiest is to solve for y in the second equation. All you have to do is subtract 2x.

Question 2:
x is already solved for. graphing doesn't matter in the substitution method. Since x is already solved for, then it would be easy to substitute 2-y for x in the second equation.

Question 3:
If you are given x, then just substitute the value for x in the y = equation.
x = 10
y = 3x - 5

y = 3(10) - 5
y = 30 - 5
y = 25

Otras preguntas