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Varvara68 [4.7K]
4 years ago
9

Which expression represents x? – 18x + 81 in factored form?

Mathematics
1 answer:
Stells [14]4 years ago
5 0

Answer:

(x-9)^{2}

Step-by-step explanation:

By factorization, we get ----

x^{2} -18x+81\\=x^{2} -9x-9x+81\\=x(x-9)-9(x-9)\\=(x-9)(x-9)\\=(x-9)^{2}

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I don't understand the 30-60-90 or the 45-45-90 to solve for the whole shape
Leviafan [203]
I'm guessing that you want to calculate the middle horizontal line.
The upper left triangle on the left is a 45 45 90 triangle.
The hypotenuse is 12 and so the leg is 12 * (1/square root of 2)
leg = 12 * <span> <span> <span> 0.7071067812 </span> </span> </span>
leg = <span> <span> <span> 8.4852813742 </span> </span> </span>
So that means the line = <span> <span> <span> 16.9705627485 </span> </span> </span>


5 0
4 years ago
Choose an equation of the line containing the points (8,3) and (13,5)
konstantin123 [22]

Answer:

y-3=2/5(x-8)

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(5-3)/(13-8)

m=2/5

y-y1=m(x-x1)

y-3=2/5(x-8)

3 0
3 years ago
The question is in the picture. Will mark brainliest! :D
PilotLPTM [1.2K]
They answer is D 5/49
5 0
3 years ago
PLEASE HELP ASAP BRAINLIEST
Y_Kistochka [10]

Area is Length x width.

Area = 4x * 5

Area = 20x

Replace A in the inequality:

Now you have 100 <= 20x <= 1,000

Now solve for x by dividing all 3 by 20:

5 <= x <=50

Check to see if they are viable:

4(5) x 5 = 20 x 5 = 100

4(50) x 5 = 200 x 5 = 1,000

Since the lowest number equals 100 and the largest number equals 1,000 all values of x would be viable. The answer is YES.

6 0
3 years ago
Is a²b the same thing as ba² ?<br><br> Please explain. Thanks so much!
Fiesta28 [93]

a²b is the same thing as ba²

b and a are two separate variables lets pretend a is 2 and b is 3

2² * 3 = 4 * 3 = 12

3 * 2² = 3 * 4 = 12

this is the commutative property of multiplication

8 0
3 years ago
Read 2 more answers
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