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
shusha [124]
3 years ago
9

Using Cramer’s rule, what is the value of x in the solution to the system of linear equations below?

Mathematics
1 answer:
Aloiza [94]3 years ago
6 0

9514 1404 393

Answer:

  d  2

Step-by-step explanation:

The system of equations can be written in augmented matrix form as ...

  \displaystyle\left[\begin{array}{cc|c}-\frac{1}{2}&3&-4\\-1&-1&-1\end{array}\right]

The value of x found by Cramer's rule is the ratio of two determinants. The numerator is the coefficient matrix with the x-column replaced by the constant column. The denominator is the coefficient matrix.

  \displaystyle x=\frac{\left|\begin{array}{cc}-4&3\\-1&-1\end{array}\right| }{\left|\begin{array}{cc}-\frac{1}{2}&3\\-1&-1\end{array}\right|}=\frac{(-4)(-1)-(-1)(3)}{(-\frac{1}{2})(-1)-(-1)(3)}=\frac{4+3}{\frac{1}{2}+3}\\\\\boxed{x=2}

You might be interested in
150.60 divided by 5/6 is ?
Lunna [17]
150.60 divided by 5/6 is 180.72.
7 0
3 years ago
Assume that the average healthy body temperature is 98.249 degrees and the standard deviation is 0.733 degrees. How many standar
Leno4ka [110]

The standard deviation is 1.43 below the mean

<h3>How to determine the number of standard deviation?</h3>

The given parameters are:

Mean = 98.249

Standard deviation = 0.733

x = 97.2

To calculate the number of standard deviation below the mean, we use

x = \bar x - n\sigma

So, we have:

97.2 = 98.249 - n * 0.7333

Evaluate the like terms

-1.049  =- n * 0.7333

Divide both sides by -0.733

n =1.43

Hence, the standard deviation is 1.43 below the mean

Read more about standard deviation at:

brainly.com/question/15858152

#SPJ1

5 0
2 years ago
Someone answer quick<br>A),B), and C)
Julli [10]

Step-by-step explanation:

a. 3 1/7 b. 3 1/6 and c. 2

8 0
3 years ago
Read 2 more answers
A company is offering to pay a stadium $750,000 per year for naming rights. If the administrative costs for this sponsorship are
juin [17]
Answer: The costs are 8.4% of the total revenue.

The stadium is going to make $750,000 for the naming rights of the stadium. The cost to the stadium is on $63,000.

To find the percent, we have to divide the two values and multiply by 100.

63000 / 750000 x 100 = 8.4%
7 0
3 years ago
Which of the following pair of sets are equal?
s344n2d4d5 [400]

Answer:

0 (1,2,3,4,5,)and (0,1,2,3,4,5,)

7 0
3 years ago
Other questions:
  • What is the surface area of the figure shown ?
    14·1 answer
  • The perimeter of a square is given as 8x + 20 write two different expressions for the perimeter use factoring to write one of th
    12·1 answer
  • Ms wang is 23 years older than her daughter. In 5 years, their ages will total 63. How old are they now?
    11·1 answer
  • A sample of 300 FM residents was taken and 135 said their favorite season was summer. Calculate a 99% confidence interval for th
    8·2 answers
  • PLEASE HELP ASAPP SHOW UR WORK i’ll mark brainliest!!
    14·1 answer
  • Bill is ten years older than his sister. If Bill was twenty-five years of age in 1983, in what year could he have been born?
    5·2 answers
  • Select all the values that are SOLUTIONS to the inequality.
    6·2 answers
  • The cost of a computer in is RS 70,502.<br>what is the cost of such 14 computer.​
    6·1 answer
  • 15 is what percentage of 30
    6·2 answers
  • Can you guys tell me what 6!/3!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!