Seudónimo Seudónimo
  • 02-02-2015
  • Mathematics
contestada

Solve each system of linear equations by substitution.
3x - 2y = 9
y = 2x - 7 Pease show all steps

Respuesta :

VzDeath
VzDeath VzDeath
  • 02-02-2015
[tex]3x-2(2x-7)=9 \\ 3x-4x+14=9 \\ -x+14=9 \\ -14\ \ \ \ -14 \\ -x=-5 \\ /-1/-1 \\ \ \ x=5[/tex]
Answer Link
Аноним Аноним
  • 02-02-2015
3x-2y=9 will be
3x-9=2y and
(3x)/2-9/2=y

2) y=2x-7

if you mean the intersection , so y=y
(3x)/2-9/2=2x-7
1,5x-4,5=2x-7
-4,5+7=2x-1,5x
2,5=0,5x
x=2,5/0,5
x=5 is the answer
Answer Link

Otras preguntas

An investor invested a total of ​$1,600 in two mutual funds. One fund earned a 4​% profit while the other earned a 2​% profit. If the​ investor's total profit w
find a ratio equivalent to 1/3and then use the ratio to write a proportion of 1/3​
list 5 ways in which poor stewardship has impacted the environment negatively .​
How many significant figures does the following number have? 9876
a fragment of a theme that forms a melodic-rhythmic unit is called a
a modem can also function as what other piece of hardware?
A small engine causes a 0.5 kg model airplane to accelerate at a rate of 13 m/s.What is the net force of the airplane
Which statement explains blood pressure? Blood pressure is highest in the veins near the heart. Blood pressure is highest in the arteries near the heart. Blood
What does Sancho want to drink? una diet coke a chocolate shake water
what is the decimal equivalent to 7/22