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ArbitrLikvidat [17]
3 years ago
11

A group of teens were surveyed about whether they prefer to read books or listen to music. A 3-column table with 3 rows. Column

1 has entries boys, girls, total. Column 2 is labeled Books with entries 50.5 percent, 49.5 percent, 100 percent. Column 3 is labeled Music with entries 38.5 percent, 61.5 percent, 100 percent. Which conclusions can be drawn from the results of the survey? Check all that apply. A person in the group who is more likely to read is a boy. A person in the group who is more likely to listen to music is a girl. A person in the group who is more likely to listen to music is a boy. There is no association between preferring reading and gender. There is no association between preferring music and gender.
Mathematics
2 answers:
Ostrovityanka [42]3 years ago
8 0

Answer:

B, D

Step-by-step explanation:

on Edge :)

zimovet [89]3 years ago
4 0

Answer: B, D

Step-by-step explanation: On Edge!!!!!!!!!!!!

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3 years ago
Find sin^4(a) + cos^4(a), if cos(a) + sin(a) = 1/3
Nadya [2.5K]

Answer:

49/81

Step-by-step explanation:

[cos(a) + sin(a)]^2 = (1/3)^2

(cos(a))^2 + 2sin(a)cos(a) + (sin(a))^2 = 1/9

(sin(a))^2 + (cos(a))^2 = 1

1 + 2sin(a)cos(a) = 1/9

2sin(a)cos(a) = -8/9

sin(a)cos(a) = -4/9

[cos(a) + sin(a)]^4 = (1/3)^4 = 1/81

(cos(a))^4 + 4sin(a)×(cos(a))^3 + 6×(sin(a))^2×(cos(a))^2 + 4(sin(a))^3×cos(a) + (sin(a))^4 = 1/81

(cos(a))^4 + (sin(a))^4 + 4sin(a)cos(a)((cos(a))^2 + (sin(a))^2) + 6(sin(a)cos(a))^2 = 1/81

cos(a))^4 + (sin(a))^4 + 4sin(a)cos(a)(1) + 6(sin(a)cos(a))^2 = 1/81

(cos(a))^4 + (sin(a))^4 + 4(-4/9) +6((-4/9)^2) = 1/81

(cos(a))^4 + (sin(a))^4 - 16/9 + 6(16/81) = 1/81

(cos(a))^4 + (sin(a))^4 = 1/81 + 16/9 - 6(16/81)

(cos(a))^4 + (sin(a))^4 = 49/81

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3 years ago
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Margaret [11]

Answer:

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Can you guys help me please ?!! Thank you!
Ilya [14]

Answer:

3/5

Step-by-step explanation:

3x3=9

3x5=15

3/5=15

4 0
3 years ago
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