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Iteru [2.4K]
3 years ago
13

13 points! Please do not use up an answer if you don't know it! I REALLY need help!

Mathematics
1 answer:
PtichkaEL [24]3 years ago
8 0
1// 3
2// -1
3// -2
4// 2
5// 6
6// 145
7// -28
8// -4544
9// -9
I am pretty sure these are all right I'd just double check them
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Two way Frequency table question
lapo4ka [179]
Answer: choice A

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Work Shown:

P(TV) = (number who watch tv)/(number total)
P(TV) = 30/100
P(TV) = 0.30

P(Girl) = (number of girls)/(number total)
P(Girl) = 55/100
P(Girl) = 0.55

P(TV)*P(Girl) = 0.30*0.55 = 0.165 which rounds to 0.17
We'll use this value later. So let's call this M = 0.17

Look in the "girl" row and "tv" column. The value 17 is here.
This is out of 100 people total, so
P(TV and Girl) = 17/100 = 0.17
Call this value N = 0.17

Because M = N = 0.17 approximately, this means that the two variables "TV" and "Girl" are approximately independent

So the equation P(TV and Girl) = P(TV)*P(Girl) is approximately true in this example.

This points to choice A being the answer.

7 0
3 years ago
A batter hits a baseball 4 feet above the ground with an upward velocity of 59 feet per second. The function h(t) = -16t^2 + 49t
Anit [1.1K]

Answer:

3 seconds

Step-by-step explanation:

when h=7 ft

-16t²+49t+4=7

-16t²+49t-3=0

16t²-49t+3=0

16t^2-48t-t+3=0

16t(t-3)-1(t-3)=0

(t-3)(16t-1)=0

t=3,t=1/16

t=1/16 seconds is the time when it just started.

so reqd.  time=3 seconds.

5 0
4 years ago
Find cos(sin-1(3/5))
melamori03 [73]
Cos(sin⁻¹(³/₅))
cos(36.87)
0.79
5 0
3 years ago
Please help with the attachment below! I forgot how to do these xD
Triss [41]
Use Mathpapa or symbolab, they are both very useful resources, and have saved me many times
8 0
3 years ago
Read 2 more answers
The quadrilateral ABCD is a parallelogram.<br> The value of a is?
Nataly_w [17]

Step-by-step explanation:

in a parallelogram, opposite angles are equal..

so C is 4a + 22. and B is 6a - 12.

sum of interior angles in a quadrilateral = 360

4a + 22. + 6a - 12. + 4a + 22. + 6a - 12 = 360

20a + 20 = 360

20a = 340

a = 17

sum of angles on a straight line = 180

B + x = 180

6 ( 17) - 12 + x = 180

102 + × = 180

× = 180 - 102

× = 78

6 0
3 years ago
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