1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MakcuM [25]
3 years ago
11

Use the substitution method to solve the following system of equations:

Mathematics
2 answers:
Ivenika [448]3 years ago
8 0
Using the first equation:
4x = y + 3   --->   y = 4x - 3
We then substitute this into the second equation:
7x - 9(4x-3) = -2   --->   7x - 9x + 27 = -2   --->   -2x = -29   --->   x = 14.5
yKpoI14uk [10]3 years ago
4 0

Answer:

x=1

y=1

Step-by-step explanation:

First step, we isolate one variable from one equation. Let's isolate y from the first equation:

4x-y=3\\-y = 3-4x\\-1*-y=-1*(3+4x)\\y=-3+4x

Next we substitute the y value in the second equation:

y=7x-9y = -2\\7x-9*(-3+4x)=-2\\7x+27-36x=-2\\-29x=-29\\x=1

Now, we replace the x value in the equation where y is isolated:

y=-3+4x\\y=-3+4*1

y=1

You might be interested in
Divide 72 in the ratio 7:2
Ksivusya [100]
Do you mean the ratio 1:2
6 0
3 years ago
Shannon has 1 nickel, 2 dimes, and 5 unknown coins totaling $0.81. What kind of coins does Shannon have and how many are there o
AlekseyPX

Answer:

The 5 unknown are 1 quarter, 3 dimes, and 1 penny.

7 0
3 years ago
Read 2 more answers
4/5 divided by -3/5 any answers because right now I’m really stuck
MatroZZZ [7]

Answer:

-1 1/3 as a mixed number (if they ask for it in simplest form, choose this one)

-4/3 as an improper fraction

Step-by-step explanation:

1. Keep, change, flip

4/5 x -5/3

2. Cross cancel the fives

4/1 x -1/3

3. Simplify

-4/3 or -1 1/3 (they're equivalent)

7 0
3 years ago
Divide <br> (6-q+8q^3-4q^2)/(2q-2)
mestny [16]

Answer:


Step-by-step explanation:

        4q2 + 2q + 3                

 (2q - 2)  l  _  8q3  -  4q2  -  q  +  6                                        

                    8q3  -  8q2                      

                           _  4q2  -  q    

                               4q2 - 4q    

                                     _  3q  +  6  

                                        6q   +  6        

                                       -3q (remainder)  


  4q2 + 2q + 3 -3q / (2q - 2)      


hope this helps

4 0
3 years ago
Help me please thanks
Alenkasestr [34]
From 0 degree Celsius to 5 with intervals of 0.1 degree Celsius
8 0
3 years ago
Other questions:
  • What is the ratio of x to y (simplest form)<br> x= 2 y=6<br> x=5 y=15<br> x=8 y=24
    11·1 answer
  • Can someone help me with #3? Please and thank you.
    15·2 answers
  • 169/13 draw a quick picture with base ten blocks explain
    7·1 answer
  • The Lewis family is building a circular swimming pool if the radius of the pool is 9 feet what is it’s circumference use TT =3.1
    6·1 answer
  • Twenty-six students will attend the field trip to the career center. The cost to attend the career center is $x. Fifteen of thes
    7·1 answer
  • Select the correct answer. The edges of a cube are 5 centimeters each and the diagonal of a face is approximately 7 centimeters.
    6·2 answers
  • What is the formula for finding the vertical distance between two points on a coordinate plane?
    10·1 answer
  • Is 0.123 greater than 2.31<br> True or False
    9·2 answers
  • F (x) = 4x^2 + 18x - 26
    9·2 answers
  • Re-order the premises in each of the arguments to show that the conclusion follows as a valid consequence from the premises. It
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!