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
Dennis_Churaev [7]
3 years ago
9

20 Points 20 points 20 points

Mathematics
2 answers:
Marat540 [252]3 years ago
6 0

Answer:

<h2>-5</h2>

Step-by-step explanation:

A=\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] \\\\\det A=\left|\begin{array}{ccc}a&b\\c&d\end{array}\right|=ad-bc

\left\{\begin{array}{ccc}x+2y=5\\x-3y=7\end{array}\right\\\\A=\left[\begin{array}{ccc}1&2\\1&-3\end{array}\right] \\\\\det A=A=\left|\begin{array}{ccc}1&2\\1&-3\end{array}\right|=(1)(-3)-(1)(2)=-3-2=-5

kykrilka [37]3 years ago
5 0

Answer:

-5

Step-by-step explanation:

You might be interested in
How do I turn 1/4 into a decimal?​
dybincka [34]

Answer:

No problem ;)

Step-by-step explanation:

1/4: 0.25

2/4:0.50

3/4: 0.75

4/4(1): 1

<em>Hope </em><em>this</em><em> </em><em>helps </em><em>you!</em>

8 0
3 years ago
Read 2 more answers
Two​-thirds of the​ T-shirts in a​ T-shirt shop are blue. Three​-fifths of those​ T-shirts are on sale. ​One-half of the blue​ T
katrin2010 [14]

Let, total number of T-shirts are x.

Number of blue T-shirts = (2/3)x = 2x/3 .

Number of blue shirts on sale = (3/5)(2x/3) = 2x/5 .

Number of medium sized blue shirts on sale = (1/5)(2x/5) = 2x/25 .

Fraction of the​ shop's T-shirts are blue​ T-shirts that are on sale and are size​ medium = \dfrac{2x/25}{x}= 2/25 . ( Number of medium sized blue shirts on sale divided by total number of T-shirts )

Hence, this is the required solution.

5 0
3 years ago
Consider the function f(x) = 5x + 7. Which statement MUST be true? A) f(1) ? f(3) = f(3) ? f(1) B) f(1) ? f(3) = f(5) ? f(3) C)
kondor19780726 [428]

Answer:

The answers are as follows for the functions.

f(1) = 12

f(3) = 22

f(5) = 32

Step-by-step explanation:

To find any of these, simply input the value in for x in the equation given.

f(1)

f(x) = 5x + 7

f(x) = 5(1) + 7

f(x) = 5 + 7

f(x) = 12

You can repeat this for each of them and it will allow you to use all of the numbers in the equations given.

6 0
3 years ago
Read 2 more answers
Would someone please help me with this
Ipatiy [6.2K]

Answer:

12,000 m³

Step-by-step explanation:

  • Area of it's base = 900 m²
  • Height of the pyramid = 40 m

The volume of a pyramid = 1/3 × area of base × height

= 1/3 × 900 × 40

= 300 × 40

= 12,000 m³

4 0
2 years ago
If f(x)=2x²+5 andq(x)=x²-2 find (f-g)(x)
Stolb23 [73]

Answer:

what grade is this

Step-by-step explanation:

7 0
4 years ago
Other questions:
  • How does multiplication relate to time conversions
    9·1 answer
  • diller elementary is collecting money to donate to a charity. $103 is collected each month. how much money is collected in 9 mon
    14·2 answers
  • This is the graph of f(x)= -6 * 2x. What is the horizontal asymptote
    15·1 answer
  • A bag contains five red marbles 3 blue marbles and 7 yellow marbles into remodels which radio can be used to compare the yellow
    7·1 answer
  • Cube root 17576 with steps
    12·1 answer
  • Find the missing Angles
    6·1 answer
  • 7th Grade Math<br> Please help<br> I will give brainliest!!<br> 19 = 5/3 r<br> Find the value of r
    8·1 answer
  • What is 2,665 divided by 36 witha remainder?
    12·1 answer
  • Which cost is greater for the company, the intial costs or the reimbursements? by how much? Justify your answer by writing and e
    12·1 answer
  • 3pqr+6pt+3pqs<br><br><br>factories
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!