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Gemiola [76]
2 years ago
9

IM IN A QUIZ HELP ME PLZZZ!!!!​

Mathematics
1 answer:
pochemuha2 years ago
3 0

Answer:

the product of a positive and negative fraction is negative

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Suppose that the mean score of a class of 32 students was 74. the 19 male students in the class had a mean score of 70. what was
andrew-mc [135]
Mean = sum of values / number of values
74 = x/32
2368 = x

70 = y/19
1330 = y

mean for female students = (2368 - 1330)/(32-19) = 79.85
5 0
3 years ago
ASAP WILL GIVE BRAINLIEST
wlad13 [49]

Answer:

802.75 pi

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
When Alice spends the day with the babysitter, there is a 0.6 probability that she turns on the TV and watches a show. Her littl
lara [203]

Answer:

A. P("Both Alice and Betty watch TV") = 12/25

B. P("Betty watches TV") = 12/25

C. P("Only Alice watches TV") = 3/25

Step-by-step explanation:

A. Because what we are told, Betty need that Alice turn on the TV, so, we first need the probability that she watches TV:

P(Alice)=3/5 (0.6)

And we know that:

P(Betty)=4/5 (0.8)

If we want the probability of both things happening at the same time (If you use a tree diagram, those events will be in the same branch), we proceed multiply them:

P("Both Alice and Betty watch TV") = 3/5 * 4/5 = 12/25

And this is the answer

B. Considering that Betty needs Alice to turn on the TV, the probability of Betty watching TV is the same as if she is with Alice.

P("Betty watches TV") = P("Both Alice and Betty watch TV") = 12/25

C. We use the same process as part A, but with a little difference. We now multiply for the probability that Betty does not watch TV (Because they still be in the same branch).

P("Betty does not watch TV") = 1 - P("Betty")

P("Betty does not watch TV") = 1 - 4/5

P("Betty does not watch TV") = 1/5

And the answer for part C is:

P("Alice watches TV without Betty") = 3/5 * 1/5 = 3/25

5 0
3 years ago
Determine if jk and lm are parallel, perpendicular, or neither j(1,9),k(7,4),l(8,13),m(-2,1)
photoshop1234 [79]

Answer:

"perpendicular"

Step-by-step explanation:

We need to find slope (m) of both line JK and LM

Slope has formula:

m=\frac{y_2-y_1}{x_2-x_1}

Lets find slope of JK:

m=\frac{4-9}{7-1}\\m=-\frac{5}{6}

Lets find slope of LM:

m=\frac{y_2-y_1}{x_2-x_1}\\m=\frac{1-13}{-2-8}\\m=\frac{6}{5}

we know if we multiply two lines' slope and get -1, they are perpendicular. Let's check:

-\frac{5}{6}*\frac{6}{5}=-1

Hence, they are perpendicular

4 0
3 years ago
Write the equation of a line in slope intercept form that has a slope of -2 and passes through the point (-1,8)
damaskus [11]

Answer:

y = -2x + 6

Step-by-step explanation:

m=slope

b=y-intercept

(x, y) = (-1, 8)

y = mx + b

8 = -2(-1) + b

8 = 2 + b

b = 8-2

b = 6

y intercept = (0, 6)

y = -2x + 6

7 0
3 years ago
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