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

A frog covers a distance of 2 3/4 feet in one leap. At this rate, the frog can cover a distance of feet in eight leaps.
solve the function y = x2 − 18x.
which type of metabolism might bacteria, that clean oil off of Beaches, use
I don't know how to do #86-#88. Any help?
Class has 8 students who are to be assigned seating by lot. what is the probability that the students will be arranged in order from shortest to tallest
Who does the speaker call to help him tell the story in paradise lost by john milton? adam and eve god and zeus all of the muses urania and the holy spirit?
Which of the following is not an accessory digestive gland? A. Submandibular gland B. Pancreas C. Frenulum D. Liver
a worker success in contributing to common good is
A woman wants to make a 4 in. wide copy of a drawing that is 5 in. wide. On the photocopier, what percent setting should she use to make a copy this size?
Why did early Americans write the constitution and bill of rights