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
aniked [119]
3 years ago
15

When using Cramer's Rule to solve a system of equations, if the determinant of the coefficient matrix equals zero and at least o

ne numerator determinant is zero, then the system _________.
A. has no solution
B. has infinite solutions
C. is consistent
D. has one solution
Mathematics
1 answer:
Arturiano [62]3 years ago
5 0

Answer:

Answer is "A"

Step-by-step explanation:

The answer would be A. When using Cramer's Rule to solve a system of equations, if the determinant of the coefficient matrix equals zero and neither numerator determinant is zero, then the system has infinite solutions. It would be hard finding this answer when we use the Cramer's Rule so instead we use the Gauss Elimination. Considering the equations:

x + y = 3 and 2x + 2y = 6

Determinant of the equations are 

| 1 1 | =0

l22l=0

You might be interested in
A random sample of 10 parking meters in a beach community showed the following incomes for a day. Assume the incomes are normall
Vlad1618 [11]

Answer: (2.54,6.86)

Step-by-step explanation:

Given : A random sample of 10 parking meters in a beach community showed the following incomes for a day.

We assume the incomes are normally distributed.

Mean income : \mu=\dfrac{\sum^{10}_{i=1}x_i}{n}=\dfrac{47}{10}=4.7

Standard deviation : \sigma=\sqrt{\dfrac{\sum^{10}_{i=1}{(x_i-\mu)^2}}{n}}

=\sqrt{\dfrac{(1.1)^2+(0.2)^2+(1.9)^2+(1.6)^2+(2.1)^2+(0.5)^2+(2.05)^2+(0.45)^2+(3.3)^2+(1.7)^2}{10}}

=\dfrac{30.265}{10}=3.0265

The confidence interval for the population mean (for sample size <30) is given by :-

\mu\ \pm t_{n-1, \alpha/2}\times\dfrac{\sigma}{\sqrt{n}}

Given significance level : \alpha=1-0.95=0.05

Critical value : t_{n-1,\alpha/2}=t_{9,0.025}=2.262

We assume that the population is normally distributed.

Now, the 95% confidence interval for the true mean will be :-

4.7\ \pm\ 2.262\times\dfrac{3.0265}{\sqrt{10}} \\\\\approx4.7\pm2.16=(4.7-2.16\ ,\ 4.7+2.16)=(2.54,\ 6.86)

Hence, 95% confidence interval for the true mean= (2.54,6.86)

7 0
4 years ago
Domain and range of g(x)= 5x-3/2x+1<br> Solve for domain and range?
alukav5142 [94]
The domain and the range

3 0
3 years ago
Tell whether the events are DEPENDENT or INDEPENDENT.
Nastasia [14]

Answer:

event A is dependent on event B since roll 3 will result if you select a face card

8 0
3 years ago
a local business was looking to hire a landscaper to work on their property. they narrowed their choices to two companies. flour
ANTONII [103]
Flourish- 120x
Green Thumb- (70x)=1600

Flourish- 120*35= $4200
Green Thumb- (70*35)+1600= $4050

It would be less expensive to hire Green Thumb Landscapers. There is a $150 difference between the two

It would take 32 hours of work for the cost to be the same for both companies<span />
7 0
3 years ago
A sports store received a shipment of 400 baseball gloves, 30% were left-
noname [10]
280 right handed gloves. First, we'd need to find out the amount of left handed gloves. We do this by multiplying 0.3 (which is basically 30%) by the total number of gloves. This is because we are finding out 30% of the 400 gloves, and "of" represents multiplication. We get 120. Then, we subtract that number from 400 to get the amount of right handed gloves, which is 280. hope this helps :)
5 0
3 years ago
Read 2 more answers
Other questions:
  • Harmony earns a \$42{,}000$42,000dollar sign, 42, comma, 000 salary in the first year of her career. Each year, she gets a 4\%4%
    6·1 answer
  • Is the solution of 1/3 x equal 21 greater than or less than 21
    14·1 answer
  • An ice cream cone has a height of 6 inches and a radius of 2 inches. A scoop of ice cream sits on the top of the cone. The scoop
    6·1 answer
  • What are two straight lines that cross each other at a right angle?         A. Curved   B. Parallel   C. Broken   D. Perpendicul
    12·1 answer
  • What is a correct name for the angle shown?​
    5·1 answer
  • Which of the following equations represent the Pythagorean theorem?
    7·1 answer
  • The two-way frequency table shows data on accidents in the last year for drivers who took a driver
    6·1 answer
  • did i do this right “what % of 369 is 26” i got 7.04 so is that the rounded answer (hundredths place) or just 7.0=7?
    14·1 answer
  • I need this done today<br> 3 yards 2 feet = __________ ft
    15·1 answer
  • How many millimeters in width is the leaf?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!