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Burka [1]
3 years ago
5

Which of the following

Mathematics
1 answer:
Black_prince [1.1K]3 years ago
4 0

Answer:

Step-by-step explanation:

-12 = 3/4n + 8....subtract 8 from both sides

-12 - 8 = 3/4n

-20 = 3/4n.....multiply both sides by 4/3, cancelling the 3/4 on the right

-20 (4/3) = n

-80/3 = n

ur answer is A

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a gardener plants seedlings in a line in small enclosures formed by bricks.Each extra seedling planted means two extra bricks ar
I am Lyosha [343]

38 seedlings

solve 2n + 2 = 78

subtract 2 from both sides

2n = 78 - 2 = 76

divide both sides by 2

n = \frac{76}{2} = 38

number of seedlings that can be planted is 38


7 0
3 years ago
College students average 8.6 hours of sleep per night with a standard deviation of 35 minutes. If the amount of sleep is normall
Soloha48 [4]

Answer:

4.27%

Step-by-step explanation:

We have been given that college students average 8.6 hours of sleep per night with a standard deviation of 35 minutes. We are asked to find the probability of college students that sleep for more than 9.6 hours.

We will use z-score formula to solve our given problem.

z=\frac{x-\mu}{\sigma}

z = z-score,

x = Random sample score,

\mu = Mean,

\sigma = Standard deviation.

Before substituting our given values in z-score formula, we need to convert 35 minutes to hours.

35\text{ min}=0.58\text{ Hour}

z=\frac{9.6-8.6}{0.58}

z=\frac{1}{0.58}

z=1.72

Now, we need to find P(z>1.72).

Using formula P(z>a)=1-P(z, we will get:

P(z>1.72)=1-P(z

Using normal distribution table, we will get:

P(z>1.72)=1-0.95728

P(z>1.72)=0.04272

0.04272\times 100\%=4.272\%

Therefore, 4.27% of college students sleep for more than 9.6 hours.

7 0
3 years ago
Pls help i will give brainly
elixir [45]

Answer:

A

Step-by-step explanation:

If you look at the graph you can see that the turtle is -24 and the dolphin abt -35

5 0
2 years ago
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larisa86 [58]

Answer:

it false

Step-by-step explanation:

7 0
3 years ago
Algebra Graph each line.<br> y = 3x + 4
Novay_Z [31]

I created this using a graphing calculator website called Desmos! You can use this to further explore slopes and lines and graphing in general :)

8 0
3 years ago
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