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Lerok [7]
3 years ago
10

Not sure if I solved this right. anyone know?

Mathematics
2 answers:
Anestetic [448]3 years ago
7 0
2tan^2x - secx = 1
Plug in the values for secx and tanx.


First choice: secx = -1
means tan^2 x = 0
2(0) - (-1) = 1

Second choice: secx = 3 = hyp/adj
means  tanx = √8
(Pythagorean theorem)
2(8) - 3 ≠ 1

Third choice: tanx = 3 = opp/adj
hyp = √(10)
means secx = √(10)
2(9) - √(10) ≠ 1

fourth choice:
tanx = -1 = opp/adj
means secx = √(2)
2(1) - √(2)  ≠ 1

fifth choice: secx = 3/2
means cosx = 2/3 ; tanx = √(5)/2
2(5/4) - 3/2 = 1

Looks like the 1st and 5th choice work.
nadya68 [22]3 years ago
6 0
Im so sorry the picture isnt loading for me -,-
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Samples of rejuvenated mitochondria are mutated(defective) in 1% ofcases. Suppose 15 samples are studied, and they can be consid
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Answer:

A)0.86

B)0.99

C)6.047E-13

Step-by-step explanation:

Since p = 0.01 and q= 0.99

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Using binomial expansion

A) Probability (No samples are mutated) = 15C0 (p)^0 * (q)^15

= 1*(0.01)^0*(0.99)^15 = 0.86

B)Probability (At most one sample is mutated) = 15C0 * p^0 *q^15 + 15C1 * p^1 * q^14 = 1*(0.01)^0*(0.99)^15 + 15C1 * 0.01 * 0.99^14 = 0.86 + 15*0.01*0.8687 = 0.86 + 0.13 = 0.99

C) Probability (More than half the samples are mutated) = 15C8* 0.01^8 * 0.99^7 + 15C9* 0.01^9 * 0.99^6 +15C10* 0.01^10 *0.99^5 + 15C11 * 0.01^11 * 0.99^4 + 15C12 * 0.01^12 * 0.99^3 + 15C13 * 0.01^13 * 0.99^ 2 + 15C14 * 0.01^14 * 0.99^1 + 15C15 * 0.01^15 * 0.99^0

Probability (More than half the samples are mutated) = 6E-13 + 4.71E-15 + 2.86E-17 + 1.31E-19 + 4.41E-22 + 1.03E-24 + 1.49E-27 + 1E-30 = 6.047E-13

3 0
3 years ago
Question 7 of 8 Which expressions describe the area of the shaded region? Select all that apply. A rectangle is divided into 12
SSSSS [86.1K]

Answer:

D. 1 4 × 1 3 E. 4 12 × 3 6

Step-by-step explanation:

D. 1 4 × 1 3 E. 4 12 × 3 6

4 0
3 years ago
What is the answer ????
forsale [732]

51= 3k

divide both sides by 3

to get k by itself

51/3= 3k/3

cross out 3 and 3, divide by 3 and becomes k

k= 17

Answer: k= 17

4 0
3 years ago
Read 2 more answers
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