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Bezzdna [24]
3 years ago
14

Find the product of (k – 9)2 using the perfect square trinomial rule shown on the left. The product (k – 9)2 can also be written

as . The product is k2 – k + .
Mathematics
1 answer:
Crank3 years ago
6 0

(a-b)^2=a^2-2ab+b^2

(k-9)^2=k^2-2\cdot k\cdot9+9^2=k^2-18k+81

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Which set of sides will make a triangle?
Klio2033 [76]

Answer:

10cm 5cm and 9cm

Step-by-step explanation:

just try this

take any two measurements and add them together if they are larger than the 3rd measurement it will work and all you have to do is do that to each measurement

10+5 is greater than 9

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9+10 is greater than 5

6 0
3 years ago
Factor the expression completely.<br> 63x – 9
liraira [26]

Answer:

The answer is 9(7x – 1).

Step-by-step explanation:

63x – 9

3 × 3 × 7 × x – 3 × 3

9(7x – 1)

Thus, The answer is 9(7x – 1).

 

<u>-TheUnknownScientist</u><u> 72</u>

4 0
3 years ago
Part 2
densk [106]

Answer:

672 students

Step-by-step explanation:

To find the answer you would first need to find how many people out of the 75 middle school students didn't prefer apples. Since 67 out of 75 students liked apples we can only assume the other 8 students didn't prefer apples. We will then divide 8 by 75 to get the percentage. This will give us the percentage .106. Next multiply 6,300 by .106 and we get 672.

3 0
4 years ago
Read 2 more answers
How can an expression or process be determined for an arithmetic sequence?
ElenaW [278]
An aritmetic sequcne is represented as

a_n=a_1+d(n-1)

where
an=nth term
a1=first term
d=common differnce, or how much each term increases by
n=which term



example

1,3,5, etc
first term is 1
common difference is 2 because it increases by 2 each time
so the formula would be
a_n=1+2(n-1)

if we had
5,3,1
first term s 5
common difference is -2 since it goes up by -2 each time
so formula is
a_n=5-2(n-1)



hope this helps
7 0
3 years ago
Evaluate the expression:<br> -(-49)<br><br> -48<br> -49<br> 49<br> 50
Aliun [14]
49, here's why...

a negative multiplied by a negative equals a positive, and if you're working with parentheses, and you don't see a sign, at all, then it means you have to multiply.

hope I helped :)
5 0
4 years ago
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