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
Dafna11 [192]
3 years ago
15

Solve the system by using elementary row operations on the equations. Follow the systematic elimination procedure.

Mathematics
1 answer:
Natali5045456 [20]3 years ago
4 0

Answer:

Step-by-step explanation:

The given equation is expressed as

x1 + 2x2 = -24- - - - - - - - --1

x1 + 7x2 = -11- - - - - - - --2

We would eliminate x1 by subtracting equation 2 from equation 1. It becomes

- 5x2 = - 13

Dividing both sides of the equation by - 5, it becomes

- 5x2/- 5 = - 13/- 5

x2 = 13/5

Substituting x2 = 13/5 into equation 2, it becomes

x1 + 7 × 13/5 = -11

x1 + 91/5 = - 11

x1 = - 11 - 91/5

x1 = - 146/5

You might be interested in
Find the angle which is equal to its supplement. ​
vesna_86 [32]

Answer:

the angle which is equal to its supplement is 90 degree

8 0
2 years ago
Write a function to represent each problem situation Carmen deposits $1000into simple interest account.The rate for the account
kolezko [41]

The function the represent the balance in the account as a function of time t is p(t) = 1000 + 40t

<h3><u>Solution:</u></h3>

Given that,

Carmen deposits $1000 into simple interest account

The rate for the account is 4%

To find: function the represent the balance in the account as a function of time t

Given is simple interest account

The formula for simple interest is given as:

S.I = \frac{ prt}{100}

Where, "p" is the principal and "r" is the rate of interest and "t" is the number of years

In simple interest,

total amount after "t" years = principal + simple interest

Here in this question, Carmen deposits $1000

p_0 = 1000

r = 4 \% = \frac{4}{100} = 0.04

Thus we can frame a function as:

total amount after "t" years = principal + simple interest

p(t) = p_0 + (p_0 \times r \times t )

p(t) = 1000 + (1000 \times 0.04)t\\\\p(t) = 1000 + 40t

Where, p(t) is the amount after "t" years and p_0 is the principal sum

Thus the function is obtained

7 0
3 years ago
a garden plot is to contain 240 sq. ft. if its length is to be 3 times its width,what should its dimensions be?
SOVA2 [1]
240 ft^2 = L X W
240 = 3W x W
240 = 3W^2
W = 8.94427 ft
L = 3W = 3(8.94427)
L = 26.8328 FT
8 0
3 years ago
Solve for y.<br> 2x-3y=9
cluponka [151]

Answer:

y = 2/3x - 3

Step-by-step explanation:

Step 1: Write equation

2x - 3y = 9

Step 2: Solve for <em>y</em>

  1. Subtract 2x on both sides: -3y = 9 - 2x
  2. Divide both sides by -3: y = -3 + 2/3x
  3. Rewrite: y = 2/3x - 3
6 0
3 years ago
Distribute 1/3(12y - 9)
allochka39001 [22]
3. 4y-3
because 1/3*12y - 1/3*9 = 4y - 3
7 0
3 years ago
Other questions:
  • A sweatshirt that was originally priced at $42.50 has been marked down to $34.00. What is the percent decrease?
    8·2 answers
  • Solve (-7/3)x - 3 = -52
    6·1 answer
  • HURRY PLEASE!
    9·1 answer
  • What is the answer to <br> x=3x-20 and y=-6+30
    15·1 answer
  • Brian’s backyard is in the shape of a square. If the yard is 21 feet long, how much land does Brian’s backyard cover?
    12·1 answer
  • Number of Students
    11·1 answer
  • PLZ help me with this question
    5·2 answers
  • Scientific notation for 7×10^9​
    11·2 answers
  • Question 8 (1 point)
    11·1 answer
  • An ocicat eats 3/5 of a pound of food daily. How many ocicats can a 19 1/2-pound bag of food feed for one week?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!