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
Inessa05 [86]
3 years ago
12

Solve the system using substitution and describe your steps. x=y-3 2x+y=12

Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
5 0
First you plug in for x,

2(y-3)+y=12

Then you solve for y
2y-5+y=12
-10y+y=12
-9y=12
-9y/9=12/-9
y=-1.333333333333333333333333333333333333333333333333333333333

You might be interested in
The March utility bills (in dollars) of 30 homeowners are listed below. 44 38 41 50 36 36 43 42 49 48 35 40 37 41 43 50 45 45 39
Ulleksa [173]

Step-by-step explanation:

What we will do is create a table with the data they give us, the first thing will be to organize it from smallest to largest, like this:

33, 35, 35, 36, 36, 36, 37, 38, 38, 39, 40, 40, 41, 41, 41, 42, 42, 43, 43, 43, 44, 45, 45, 47, 48, 48, 49, 50, 50, 50

Now we know that the smallest number is 33 and the largest is 50, to create 5 ranges, we will calculate the difference and divide by 5.

(50 - 33) / 5 = 3.4

Therefore we will make ranges of 3 and 4, values, like this

Rank 1: 33 - 36

Rank 2: 37 - 39

Rank 3: 40 - 43

Rank 4: 44 - 46

Rank 5: 47 - 50

We will calculate the frequency distribution of values in each range:

Rank 1: 6

Rank 2: 4

Rank 3: 10

Rank 4: 3

Rank 5: 7

5 0
3 years ago
Write an equation in terms of x. Solve the equation. Then find AB and BC.
Wittaler [7]
The answer is AB=7×+2
6 0
2 years ago
twenty students in A and 20 students in class B were asked how many hours they took to prepare for an exam.The data sets represe
SSSSS [86.1K]

Answer:

is there a graph i can read?

Step-by-step explanation:

6 0
2 years ago
How to solve X^4-19x^2+48=0
ZanzabumX [31]
Two numbers that add up to -19 and multiply to 48 are -16 and -3:

(x^4-19x^2+48)=0\\(x^2-16)(x^2-3)=0\\(x+4)(x-4)(x^2-3)=0

So, the solutions come from each parentheses:  x+4=0, x-4=0, and x^2-3=0.

x+4=0
x = -4

x-4=0
x = 4

x^2-3=0
x^2 = 3
x = +/- √3

So, the solutions are -4, -√3, √3, and 4.
4 0
3 years ago
Please help me!<br><br> Solve for x<br><br> 4−(2x+4)=5
Helga [31]
<span>4−(2x+4)=5
4 - 2x - 4 = 5
  -2x = 5
     x = -5/2
     x = - 2.5</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • Write an equation for: melissa has 6 times as many quarters as Michelle. Together they have 896 quarters. How many quarters, q,
    6·1 answer
  • The circumference of a circle is 188 meters. What is the approximate radius of the circle?
    10·2 answers
  • The product of (x+2) (x-3) is​
    8·2 answers
  • Evaluate (-12)(-2) ^2
    13·1 answer
  • a strip of paper is 9/10 of an inch long. you need to cut the paper into 3/12 inch pieces. how many pieces will you be able to c
    12·1 answer
  • Is 0.45545455545… a rational or irrational number? Explain two reasons for your classification.
    11·1 answer
  • Solve the formula for the indicated variable<br><br> rx + ry = 4 for r
    7·1 answer
  • Rewrite in simplest terms -5(3u + 1) + 10
    5·1 answer
  • Without adding, find the sum of :d) 1+3+5+7+9+11+13+15+17+19​
    6·1 answer
  • If your car gets 28 miles per​ gallon, how much does it cost to drive 390 miles when gasoline costs ​$2.90 per​ gallon?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!