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nexus9112 [7]
2 years ago
11

Chọn phát biểu đúng trong các phát biểu sau đây :

Mathematics
1 answer:
noname [10]2 years ago
4 0

Step-by-step explanation:

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What is the angle of rotation of this regular octagon? what is the measure of an interior angle?
MrRissso [65]
Second question:
sum of all the interior angle     180*(8-2)=1080 degree
sum of one interior angle         1080/8=135 degree 
6 0
3 years ago
A line has the equation 3x–4y–12=0.<br><br> Is the point (2, −1) on the graph?
zmey [24]

Answer:

The point (2, -1 ) is not on the graph of the line.

Step-by-step explanation:

3x–4y–12=0

3*2 - 4*(-1) - 12= 0

6 + 4 - 12 =0

10 - 12 = 0

- 2 = 0 , false, so the point (2, -1 ) is not on the graph of the line.

3 0
3 years ago
Read 2 more answers
An organic farm has been growing an heirloom variety of summer squash. A sample of the weights of 40 summer squash revealed that
natta225 [31]

Answer:

b. 0.0228

Step-by-step explanation:

We are given that

n=40

Mean,\mu=402.7 g

Standard deviation, \sigma=8.8g

We have to find the probability hat the mean weight for a sample of 40 summer squash exceeds 405.5 grams.

P(x>405.5)=P(\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}>\frac{405.5-402.7}{\frac{8.8}{\sqrt{40}}})

P(x>405.5)=P(Z>\frac{2.8}{\frac{8.8}{\sqrt{40}}})

P(x>405.5)=P(Z>2.01)

P(x>405.5)=1-P(Z\leq 2.01)

P(x>405.5)=1-0.977784

P(x>405.5)=0.022216

Hence, option b is correct.

5 0
2 years ago
PLEASE HELP ME LIKE RN THIS IS 7TH GRADE MATH BTW
natulia [17]

Answer:

for the third one 2/5 for the fourth one 3/5

Step-by-step explanation:

For the first one, I put 10/25 as a fraction and found the least common multiple, which is 5. I then simplified, and got 2/5.

For the second one, I chose 3/5 because there are 3 friends whose names end in a, and 5 friends whose names do not end in a. My theory was that I took the friends and divided them into 2 groups by most common.

hope this helps if it doesn't I will correct myself :)

8 0
2 years ago
Read 2 more answers
Help me please help
Iteru [2.4K]
I am not sure but i think it’s 56•
8 0
2 years ago
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