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Schach [20]
4 years ago
7

What is the 9th term in the sequence -1,4,-9,16, -25,​

Mathematics
1 answer:
Irina18 [472]4 years ago
5 0

Answer:

Step-by-step explanation:

Wow! There are 2 things going on here, so let's go step by step.

The first thing to notice is that the numbers are going negative, positive, negative, positive. Odd-numbered terms are negative while even-numbered terms are positive. Since 9 is odd number, we know the answer must be negative.

Secondly, the 1, 4, 9, 16 sequence is called the square numbers. They are 1 x 1, 2 x 2, 3 x 3, 4 x 4, etc. The 9th term will be 9 x 9 ( ignoring the negative).

Adding the first point with the second, we get   (-81)  { negative eighty-one }

Hope this helps.

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Anyone know how to do this?
lesya692 [45]

Answer:

They cannot form a triangle.

Step-by-step explanation:

A triangle can only be formed if the sum of the lengths of any 2 sides are greater than the 3rd side. 2 + 7 is less than 15, so this cannot be a triangle.

8 0
3 years ago
REALLY NEED MATH MIDPOINT STUFF HELP
elena-14-01-66 [18.8K]
The answer to this question would be: (6.5 , 8.5)

To answer this question, you need to determine the x and y distance of both point. From A point the distance would be: 
X distance= 14-4= 10
Y distance= 10-8= 2

Making it into 1:3 ratio means that dividing the line into 4 parts then take 1 part from the point A, or 3 part from point B. From A point the distance would be 1/4 total distance
The location would be:
X= 4 + (10*1/4)= 6.5
Y= 8+ (2*1/4)= 8.5
(6.5 , 8.5)
4 0
3 years ago
Read 2 more answers
If a number is divided by a negative number will the outcome be positive?
Zielflug [23.3K]
That would depend...

-4 / -2 = 2........4 / 2 = 2 <== if the signs are the same
but
4 / -2 = -2.......-4 / 2 = -2 <== if the signs are different

 So basically, if the signs are the same, the result is positive and if the signs are different, the result is negative
7 0
3 years ago
Divide. Express your answer in simplest form. 2 1/2 ÷ 2 1/6 <br><br>13/15 5 5/12 26/30 1 2/13
Marianna [84]

Answer:

\frac{15}{13}  = 1 \frac{2}{13}

Step-by-step explanation:

2 \frac{1}{2}  \div 2 \frac{1}{6}  \\  \\  \\  \frac{5}{2}  \div  \frac{13}{6}  \\  \\  \\  \frac{5}{2}  \times  \frac{6}{13}  \\  \\  \\  \frac{5}{1}  \times  \frac{3}{13}  \\  \\  \\ =   \frac{15}{13}  \\  \\  \\  =  1\frac{2}{13}

I hope I helped you^_^

7 0
2 years ago
Read 2 more answers
Could someone help me on this
allochka39001 [22]

Answer:

13.) 314.2 in²

15.) 181.5 ft²

Step-by-step explanation:

The area of a circle is found using the equation:

A = πr²

In this equation, "π" represents the number pi (3.14....) and "r" represents the radius (half the diameter).

For 13.), you have been given the radius. Thus, you can substitute it into the equation and solve for "A".

A = πr²

A = π(10)²

A = π x (100)

A = 314.2 in²

For 15.), you have been given the diameter. To find the radius, you need to divide this value by 2. Once you find the radius, you can plug it into the equation and simplify like above.

diameter = 15.2 ft
radius = 7.6 ft

A = πr²

A = π(7.6)²

A = π x (57.76)

A = 181.5 ft²

8 0
2 years ago
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