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8090 [49]
3 years ago
16

Which best describes the relationship between the successive terms in the sequence shown? 9, –1, –11, –21, … The common differen

ce is –10.  The common difference is 10.  The common ratio is –9. The common ratio is 9.
Mathematics
2 answers:
anastassius [24]3 years ago
6 0
Note that subtracting 10 from 9 results in -1, subtracting 10 from -1 results in -11, and so on.  So the common difference is -10.
storchak [24]3 years ago
5 0
The difference is -10 because

9-10= 1
-1-10= -11
-11-10= -21

common difference means you add and common ratios means you multiply.

hope this helps!
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An official playing field (including end zones) for the Indoor Football League has a length 29 yd longer than its width. The per
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An official playing field (including end zones) for the Indoor Football League has a length 29 yd longer than its width. The perimeter of the rectangular field is 158 yd. Find the length and width of the field

Step-by-step explanation:

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Mr. Barrow scored his high school students' essays on a scale of 0 to 10. He recorded data about the scores in the table below.
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Which statement is true about this argument? premises: if an angle measure is greater than 90°, then the angle is an obtuse angl
vazorg [7]
Answer: option d. the argument is valid by the law of detachment.

The law of detachment consists in make a conlcusion in this way:

Premise 1) a => b
Premise 2) a is true

Conclusion: Then, b is true

Note: the order of the premises 1 and 2 does not modifiy the argument.

IN this case:

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3 years ago
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Can someone help me !
castortr0y [4]

Answer:

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Step-by-step explanation:

4 0
2 years ago
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What is <br><br> 3x+2y=-13<br> 3x+4y=1
Zepler [3.9K]

Answer:

The values are

x = -25/9 = -2 7/9

y = 7/3 = 2 1/3

Step-by-step explanation:

3x + 2y = -13 --------eqn 1

3x + 4y = 1-------------eqn2

Using eqn 2 to get the value of y

3x + 4y = 1

4y = 1 - 3x

Dividing both sides by 4,to get y

4y/4 =( 1 -3x) / 4

y = (1 - 3x) / 4

Since we've gotten the value for y, substitute the value into eqn 1

3x + 2y = -13

3x + 2(3x - 1)/4 = -13

Opening the bracket

3x + (6x - 2)/4 = -13

LCM = 4

(12x + 6x - 2) / 4 = -13

18x - 2 / 4 = -13

Then we cross multiply

18x - 2 = -13 * 4

18x - 2 = - 52

18x = -52 + 2

18x = -50

Divide both sides by 18, to get the value of x

18x/18 = -50/18

x = -25/9

or x = -2 7/9

The value of x is now known, so let's go back to eqn 2

Substitute x = - 25/9

3x + 4y = 1

3(-25/9) + 4y = 1

Open the bracket

-75/9 + 4y = 1

Make y the subject of the formula

4y = 1 + 75/9

LCM = 9

4y = (9 + 75)/ 9

4y = 84/9

To get y, divide both sides by 4

4y/4 = 84/9 / 4/1

y =

Note : when division changes to multiplication, it always be in its reciprocal form

y = 84/9 / 1/4

y = 84 * 1 / 9 *4

y = 84/ 36

y = 7/3

Or

y = 2 1/3

4 0
3 years ago
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