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Alona [7]
3 years ago
5

Factor completely. 81x^4 − 1

Mathematics
1 answer:
Taya2010 [7]3 years ago
6 0
81x^4-1=(9x^2-1)(9x^2+1)
=(3x-1)(3x+1)(9x^2+1)
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This figure shows circle Z with chords AB and RS . mAR=55° mRB=66° AB=8 m RS=8 m What is mRS?
Alina [70]
M AR = 55°
m RB = 66°
Like AB=8 m =RS →m RS = m AB

m AB = m AR + m RB
m AB = 55° + 66°
m AB = 121°

m RS = m AB
M RS = 121°

Answer: m RS is 121°
4 0
4 years ago
Read 2 more answers
All students = 700
Sedaia [141]

Answer:

  • See below

Step-by-step explanation:

<u>Given:</u>

  • Total number = 700
  • Off grid class = 450
  • Online class = 320
  • Both = 275

<u>Based on the given we find the following</u>

1) <u>Off-grid class only:</u>

  • 450 - 275 = 175

3) <u>Online class only:</u>

  • 320 - 275 = 45

2) <u>None of the classes:</u>

  • 700 - (175 + 275 + 45) = 205

4) <u>Not online:</u>

  • 700 - 320 = 380

5) <u>Not off-grid:</u>

  • 700 - 450 = 250
7 0
3 years ago
On Thursday, the high temperature was 60 degrees Fahrenheit. On Friday, the high was 72 degrees Fahrenheit
disa [49]

Answer: 120 percent increase

Step-by-step explanation:

72/60 = 1.2

1.2 times is also 120 percent

3 0
3 years ago
Two sides of a triangle measure 10cm and 18cm . Which could be the measure of the third side of the triangle?
ValentinkaMS [17]
It cannot be 30, because the sum of two sides should be more than third side
-not D
10+18=28 <30

it cannot be 6 +10 < 18

it cannot 8
8+10=18

so it is has to be C) 12
12+18>10
10+12>18
10+18>12
answer  C. 12 cm

8 0
3 years ago
Looking for the answer and explanation for this equation 7xy=? x=1 y=3
Dmitrij [34]
If you plug in the x and y, you get
7(1)(3)
7 x 1 x 3 = 21, so the answer is 21
6 0
3 years ago
Read 2 more answers
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