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
Anit [1.1K]
2 years ago
15

Need some help with this matrices question​

Mathematics
1 answer:
katovenus [111]2 years ago
3 0

Answer:

4. D

5. D

Step-by-step explanation:

To subtract Matrices, subtract the numbers that are in the same position.

You can only add or subtract Matrices that have the same order.

Here, both Matrix X and Y, are 2 by 2 matrices.

So let's subtract

5 - 6 =   - 1

- 4 - ( - 1) =  - 3

3 - ( - 7) = 10

- 2 - 4 =  - 6

The Matrix that matches that is D so the answer to 4 is D.

5. We do the same thing above, but we multiply by 2 first.

5 - 2(6 ) =  - 7

- 4 - 2( - 1) =  - 2

3 - 2( - 7) = 17

- 2 - 2( 4) =  - 10

The answer here is D as well.

You might be interested in
The square root of a number that is not a perfect square will need to be rounded to the nearest whole number.
mariarad [96]

Answer:

false because rounding it will not show the exact number

6 0
3 years ago
Read 2 more answers
| 2p -1 | =45, what are the values of p?
Alex73 [517]

Answer:

p = 23       and p = -22

Step-by-step explanation:

| 2p -1 | =45

Absolute value equations have 2 solutions, one positive value and one negative

2p-1 = 45    and 2p-1 = -45

Add 1 to all sides

2p-1+1 = 45+1    and 2p-1+1 = -45+1

2p = 46                        2p = -44

Divide by 2

2p/2 = 46/2    and   2p/2  = -44/2

p = 23       and p = -22

5 0
3 years ago
Read 2 more answers
How much of other chemicals must be evaporated from 400 grams of a hand sanitizer
yulyashka [42]

Answer:

24 g

Step-by-step explanation:

We first find the mass of 24 % alcohol in 400 g of hand sanitizer. Let x be the mass of alcohol. So, x/400 × 100 % = 24 %

x/400 = 0.24

x = 0.24 × 400

  = 96 g

The mass of the other chemicals is thus 400 g - 96 g = 304 g

We now find the mass of 30 % alcohol in 400 g of hand sanitizer. Let y be the mass of alcohol. So, y/400 × 100 % = 30 %

y/400 = 0.30

y = 0.30 × 400

  = 120 g

The mass of the other chemicals is thus 400 g - 120 g = 280 g

The mass of other chemicals that needs to be evaporated is thus 304 g - 280 g = 24 g

5 0
3 years ago
Please help me with these questions. Thank you.
Bas_tet [7]

Answer:

36 x⁸y⁶

 √2/2

Step-by-step explanation:

Factor 1296 into its prime factors

           1296 = 24 • 34 

To simplify a square root, we extract factors which are squares, i.e., factors that are raised to an even exponent.

Factors which will be extracted are :

           1296 = 24 • 34 

No factors remain inside the root !!

To complete this part of the simplification we take the squre root of the factors which are to be extracted. We do this by dividing their exponents by 2 :

           36 = 22 • 32 

At the end of this step the partly simplified SQRT looks like this:

         36 √(x¹⁶y¹²)

STEP2:Simplify the Variable part of the SQRT

Rules for simplifing variables which may be raised to a power:

   (1) variables with no exponent stay inside the radical

(2) variables raised to power 1 or (-1) stay inside the radical

   (3) variables raised to an even exponent: Half the exponent taken out, nothing remains inside the radical. examples:

      √(x⁸)=x⁴

     √(x^-6)=x^-3

 

 Applying these rules to our case we find out that

      SQRT(x¹⁶y¹²) = x⁸y⁶

Combine both simplifications

      sqrt (1296x¹⁶y¹²) =  36 x⁸y⁶

Simplified Root : 36 x⁸y⁶ 

number 2)

3√2/3√4=

=3√2/3×2

=3√2/6

=3√2/6 ×3/3

=1√2/2

=√2/2

3 0
2 years ago
Osvoldo has a goal of getting at least 30%, percent of his grams of carbohydrates each day from whole grains.
Pachacha [2.7K]
To answer this you need to figure out what 30% of the total number of carbs need to be whole-grain. Multiply 0.3 times 220 to get 66 grams. He did not meet his goal. Because he only ate 5 g, this is 61 less than he needs to meet his goal.
4 0
3 years ago
Other questions:
  • 6^2r=800 round it to the nearest hundreth
    5·1 answer
  • Which equation represents a line with a greater slope and lesser y intercept than the line shown?
    10·1 answer
  • What is the area of the model in the problem?
    11·1 answer
  • I NEED HELP PLEASE. LOOK AT PICTURE
    9·1 answer
  • Elyse had of a pizza left over. She ate of the
    11·1 answer
  • ASSIGNMENTS
    13·1 answer
  • Solve my problem, PLEASE!!!!
    5·2 answers
  • I need to put equations into slope intercept and i need big help its a test grade
    10·1 answer
  • Simplify by combining like terms: 1.9h + 4.5h + 8
    15·2 answers
  • Please help me with this ixl please
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!