Questions 19 - 23. 23 is cut off a part so the second page is the rest of it. (pls I am clearly clueless in math..)

19. Distributive property is multiplying everything outside of the parenthesis by everything in them!

Let's do it

2(3x + 4y)

We will multiply 2 by 3x and 2 by 4y

2 × 3x + 2 × 4y = ?

6x + 8y

20. Solving algebraically is using multiplication and division, addition and subtraction!

5h = 25

divide 25 by 5 to find h

h = 25/5

h = 5

2 + c = 12

subtract 2 from both sides

2 + c - 2 = 12 - 2

c = 12 -2

c = 10

3y + 10 = 40

We need to do subtraction and division for this one!

Let's subtract 10 from both sides

3y + 10 -10 = 40 - 10

3y = 30

Divide 30 by 3 to find y

y = 30/3

y = 10

CAN't SOLVE #21 BECAUSE OF LACK OF INFO

22. To find equivalent ratios, let's simplify them!

To simplify ratios, we need to find the highest common factors

a. 2:6

The highest common factor between 2 and 6 is 2, so let's divide both sides by 2

We get ... 1 : 3

b. The highest common factor between 12 and 30 is 6, so let's divide both sides by 6

We get ... 2 : 5

23. To find how many songs are played during a certain amount of time, all we need to do is multiply 12 (the amount of songs played in 1 hour) by however many hours they say!

This can be expressed like this

a. # of songs = 12 × h

Now let's use this expression to answer the next two parts of this question!

b. to find the "# of songs" played in 24 hours, all we need to do is multiply 12 by 24! 24 will be the "h" in our expression. h is the number of hours

Here's what it looks like using our expression we made

# of songs = 12 ( 24)

Solve using a calculator

# of songs = 288

c. To find how many hours it will take to play 60 songs, we will put it in place of the LEFT SIDE of the equation that says "# of songs"

Let's solve it now!

It looks like this ... 60 = 12h

Let's divide to find the number of hours!

60/12 = h

60/12 = 5

It will take 5 hours to play 60 songs!

Hope I helped! Message me or comment if you have any questions or concerns! :)

i used to know how to do this in 7th but i forget easily

step-by-step explanation:

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column