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alexira [117]
3 years ago
11

3(4) Solve 3(x-9)=21

Mathematics
2 answers:
Bas_tet [7]3 years ago
7 0

Answer:

X=16

Step-by-step explanation:

Solve 3(x-9)=21   IF X = 16

16-9 = 7

3X7= 21

grin007 [14]3 years ago
6 0

Answer:

x = 16

Step-by-step explanation:

3(x-9)=21

3x-27=21

+27 +27

3x/3=48/3

x=16

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Which value of y mAkes the equation below true. 3y+8-7y=11
victus00 [196]
We have
3y+8-7y=11
First, we can combine like terms 3y and -7y to get -4y.
Then, we have-4y+8=11 We could then subtract 8 on both sides to get -4y=3
Finally,  we isolate y completely by dividing both sides by -4, to get
y=- \frac{3}{4}
6 0
2 years ago
Use the substitution method to solve the system of equations. Choose the
luda_lava [24]

Answer:

(2, 22 )

Step-by-step explanation:

Given the 2 equations

y = 7x + 8 → (1)

y = x + 20 → (2)

Substitute y = 7x + 8 into (2)

7x + 8 = x + 20 ( subtract x from both sides )

6x + 8 = 20 ( subtract 8 from both sides )

6x = 12 ( divide both sides by 6 )

x = 2

Substitute x = 2 in (2) for corresponding value of y

y = x + 20 = 2 + 20 = 22

Solution is (2, 22 )

7 0
3 years ago
Calvin wants to buy for books at 4.89 dollars each estimate how much change will get back from two $10 bills
Lemur [1.5K]

Answer:

44 cents

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
There are 7 girls and 9 boys on a playground.
Anon25 [30]

The ratio of the number of girls to the total number of children is 7 : 16.

<h3>Ratio is defined as follows:</h3>
  • It is a comparison between two or more numbers that measures sizes in relation to each other
  • It describe how much of a thing is compared to another.

The number of girls in the playground = 7

The number of boys in the playground = 9

The total number in the playground is the sum of the number of girls and the number of boys.

Therefore,

total children in the playground = 7 + 9 = 16

The ratio of the number of girls to the total number of children can be express as follows:

  • Ratio  = 7 : 16

learn more on ratio here: brainly.com/question/26169121?referrer=searchResults

8 0
2 years ago
Read 2 more answers
Plz help me I need because it’s one of my last assignments for school
Brums [2.3K]

Step-by-step explanation:

straight line = 180 degree

example

1) 2w - 24 + 2w - 40 = 180

4w = 180 + 24 + 40

4w = 244

w = 244/4

.......

2) 13n - 11 +(-9 + 12n)

13n - 11 -9 + 12n = 180

25n -20 = 180

25n = 180 + 20

25n = 200

n = 200/25

.........

8 0
3 years ago
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