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hjlf
3 years ago
15

What the questions are asking help ASAP please

Mathematics
1 answer:
Rudiy273 years ago
3 0

Answer:

Step-by-step explanation:

A scalar is a constant value that is multiplied throughout a matrix.

e.g.

In number 1 the set up would look like this

3 * \left[\begin{array}{ccc}3&-1&5\\2&1&-4\\-6&3&2\end{array}\right]

To solve this, you must distribute the 3 to each value within the matrix

The solution to #1 would be

M = \left[\begin{array}{ccc}9&-3&15\\6&3&-12\\-18&9&6\end{array}\right]

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Solve the system by substitution.<br> [-2.5x+y = 13.5<br> 12.25x - y=-12.25
IrinaK [193]

Answer:

x = 5/39 , y = 539/39

Step-by-step explanation:

Solve the following system:

{y - 2.5 x = 13.5

12.25 x - y = -12.25

In the first equation, look to solve for y:

{y - 2.5 x = 13.5

12.25 x - y = -12.25

y - 2.5 x = y - (5 x)/2 and 13.5 = 27/2:

y - (5 x)/2 = 27/2

Add (5 x)/2 to both sides:

{y = 1/2 (5 x + 27)

12.25 x - y = -12.25

Substitute y = 1/2 (5 x + 27) into the second equation:

{y = 1/2 (5 x + 27)

1/2 (-5 x - 27) + 12.25 x = -12.25

(-5 x - 27)/2 + 12.25 x = 12.25 x + (-(5 x)/2 - 27/2) = 9.75 x - 27/2:

{y = 1/2 (5 x + 27)

9.75 x - 27/2 = -12.25

In the second equation, look to solve for x:

{y = 1/2 (5 x + 27)

9.75 x - 27/2 = -12.25

9.75 x - 27/2 = (39 x)/4 - 27/2 and -12.25 = -49/4:

(39 x)/4 - 27/2 = -49/4

Add 27/2 to both sides:

{y = 1/2 (5 x + 27)

(39 x)/4 = 5/4

Multiply both sides by 4/39:

{y = 1/2 (5 x + 27)

x = 5/39

Substitute x = 5/39 into the first equation:

{y = 539/39

x = 5/39

Collect results in alphabetical order:

Answer: {x = 5/39 , y = 539/39

5 0
3 years ago
How many years will Samsung galaxy 2 in 1 laptop last
rodikova [14]

Answer:

i think 6 years because i always used it

Step-by-step explanation:

make me my brainliest answer

4 0
2 years ago
(Figure is provided below)
DanielleElmas [232]

Answer:

The measure of ∠z   = 137°

Step-by-step explanation:

Here, angle 1  = 43°

To find : ∠z

Straight line Angle:  The angle which measures exactly 180° and is extended by a point on a straight line is called straight angle.

According to the given figure:

  ∠1 + ∠z  = 180 °  (STRAIGHT LINE ANGLE)

or,   ∠z  = 180 ° - 43° = 137°

Hence, the measure of ∠z   = 137°.

7 0
3 years ago
How does 3/4 equivalent to 75/100?
Deffense [45]
3/4 is equivalent to 75/100 because if you simplify 75/100 it equals 3/4. Also think about like quarters 4 quarters = $1.00 and 3 quarters = $0.75. I hope this helped :)!!
8 0
2 years ago
Read 2 more answers
What is 54 divided by 6
kap26 [50]

Answer:

43

Step-by-step explanation:

5 0
2 years ago
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