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Rzqust [24]
3 years ago
12

Complete the multiplication: AB. A. B. C. D.

Mathematics
1 answer:
Firdavs [7]3 years ago
6 0
These array of numbers shown above are called matrices. These are rectangular arrays of number that are arranged in columns and rows. It is mostly useful in solving a system of linear equations. For example, you have these equations

x+3y=5
2x+y=1
x+y=10

In matrix form that would be

\left[\begin{array}{ccc}1&3&5\\2&1&1\\1&1&10\end{array}\right]

where the first column are the coefficients of x, the second column the coefficients of y and the third column is the constants, When you multiple matrices, just multiply the same number on the same column number and the same row number. For this problem, the solution is

\left[\begin{array}{ccc}3*2&0*8\\2*0.6&-1*3\end{array}\right] =  \left[\begin{array}{ccc}6&0\\1.2&-3\end{array}\right]

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A video game system and several games are sold for $ 648. The cost of the games is 3 times as much as the cost of the system. Fi
podryga [215]

First set up the equation.

x + 3x = 648

Then solve for x.

4x = 648

Divide both sides by 4.

x = 162.  So the answer for the system would be $162 and the price for the games would be $486.  Add the two up to check your work and you will get $648.  Hope this helped!

-TTL

5 0
3 years ago
Two sides of a triangle
True [87]

step 1: open brackets n rmb to flip the signs

step 2 (optional): rearrange to make the equation clearer to add/minus

length of 3rd side:

(8x + 3) - (2x + 1) -(5x + 2)

= 8x + 3 - 2x -1 - 5x -2

= 8x -2x -5x +3 -1 -2

= x

Therefore, length of 3rd side is X cm.

---

If perimeter = 75cm,

8x +3 = 75

8x = 75-3

8x = 72

x = 9 cm

Therefore,

1st side = 2(9) +1

= 19 cm

2nd side = 5(9) +2

= 47 cm

3rd side = 9 cm

4 0
3 years ago
Which is a true statement?
julsineya [31]
B.  <span>–4.37 < –1.63  is the true statement. -4.37 is less than -1.63
</span>
A. <span>–4.28 > –3.56 * should be less than
</span>C. <span>5.7 < 5.63      * should be greater than
</span>D. -13.90 > 4.63 *should be less than

In dealing with negative numbers, the greater the negative number is, the lesser its value. 4.37 is a greater number than 1.63 in its positive form, however, its negative form give 4.37 a lesser value than 1.63 in its negative form. 
7 0
3 years ago
Read 2 more answers
Ok so i need the work and answer for this problem is due asap click the picture.
IRISSAK [1]

Answer:

C. 36

Step-by-step explanation:

There are 217 students and 35 adults.

217 + 35 = 252 people

There are 7 buses for 252 people

252 people ÷ 7 buses = 36 people per bus

7 0
3 years ago
Read 2 more answers
Msh
Rudiy27

a Anna drives her sisters at an a average of 60 mph and devive home

3 0
3 years ago
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