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
dlinn [17]
3 years ago
14

HELP PRECALC DO NOT UNDERSTAND WILL GIVE BRAINLIEST

Mathematics
1 answer:
Olegator [25]3 years ago
3 0

Answer:

  the lower right matrix is the third correct choice

Step-by-step explanation:

Your problem statement shows that you have correctly selected the matrices representing the initial problem setup (middle left) and the problem solution (middle right).

Of the remaining matrices, the upper left is an incorrect setup, and the lower left is an incorrect solution matrix.

__

We notice that in the remaining matrices on the right that the (2,3) term is 0, and the (3,2) and (3,3) terms are both 1.

The easiest way to get a 0 in the 3rd column of row 2 is to add the first row to the second. When you do that, you get ...

  \left[\begin{array}{ccc|c}1&1&1&29000\\1+2&1-3&1-1&1000(29+1)\\0&0.15&0.15&2100\end{array}\right] =\left[\begin{array}{ccc|c}1&1&1&29000\\3&-2&0&30000\\0&0.15&0.15&2100\end{array}\right]

Already, we see that the second row matches that in the lower right matrix.

The easiest way to get 1's in the last row is to divide that row by 0.15. When we do that, the (3,4) entry becomes 2100/0.15 = 14000, matching exactly the lower right matrix.

The correct choices here are the two you have selected, and <em>the lower right matrix</em>.

You might be interested in
A random sample of 10 colleges was taken. A 95% confidence interval for the mean admission rate was left parenthesis 52.8 % comm
garik1379 [7]

Answer:

a. We are confident that the mean admission rate is between 52.8% and 75.0%

Step-by-step explanation:

When you have an unknown population parameter you can use a sample to delimit an interval in which this parameter is, the interval is called confidence interval and the confidence level is the probability of the parameter being inside the interval. The confidence interval is represented by a pair of numbers, in this case, the pair is (52.8%, 75.0%) and the confidence level is 95%, with that level you can say that you're confident that the mean admission rate is between  (52.8%, 75.0%).

8 0
3 years ago
Olivia has $150 in her savings account. She will save and deposit $40 each week. What inequality show how many weeks it will tak
taurus [48]

Answer:

40x+150>=400 i think

Step-by-step explanation:

40x+150>=400

40x>=250

x=6.25

7 0
2 years ago
a shopkeeper buys cocacola 60 rupees a dozen and sell 6 rupees per bottle find his profit or loss persentage​
Lady_Fox [76]

Answer:

20%

Step-by-step explanation:

12 bottle is 60 rupees

each sold 6 ruppes

so 12 bottle cost 72 ruppes

12*100/60 = 20%

8 0
3 years ago
Read 2 more answers
Out of 230 students, 11% chose gymnastics as their favorite sport. How many students does 11% represent? *
joja [24]

Answer:

25

Step-by-step explanation:

11\% \: of \: 230 \\  \\  =  \frac{11}{100}  \times 230 \\  \\  = 0.11 \times 230 \\  \\  = 25.3 \\   = 25

Hence 11% represents 25 students.

5 0
3 years ago
What is the value of the expression below?<br><br> 0.72/0.36*2
Tanya [424]

Answer:

<h2>1</h2>

Step-by-step explanation:

0.72/0.36 x 2

0.72/0.72

1

I'm always happy to help :)

8 0
3 years ago
Other questions:
  • PLEASE HELP!!!!!!!
    6·1 answer
  • Randy walks his dog each morning. He walks 7/12 of a mile in 7 minutes. How many miles does he walk in 1 minute?
    13·2 answers
  • The mean cost of a five pound bag of shrimp is 50 dollars with a variance of 64. If a sample of 43 bags of shrimp is randomly se
    13·1 answer
  • What is the value of log^7^343
    11·1 answer
  • !!!!! HELP PLEASEEE!!!!
    5·1 answer
  • The tennis team has played 28 matches so far this season. They have won 10 matches so far. How many matches will the team need t
    13·1 answer
  • CAN YALL HELP ME PLEASE ON THIS ILL GIVE YOU BRAINLIEST AND ALL MY POINTS
    6·2 answers
  • Point A is located at (1, 5), and point A′ is located at (-2, 1). What is the distance from B to B′ ?
    7·1 answer
  • If 100 beach umbrellas have a mass of 865.2kg what is the mass of each umbrella
    15·1 answer
  • I know it’s a lot but pls help me thx
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!