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V125BC [204]
3 years ago
11

Please help me asap!!

Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
6 0

Answer:

D

Step-by-step explanation:

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Trong kiểm định giả thuyết thống kê về so sánh trung bình với số cho trước, nếu tổng thể X không có phân phối chuẩn thì cần điều
Lana71 [14]

Answer:

Khi cỡ mẫu bằng hoặc lớn hơn 30 thì phân phối chuẩn.

Tuy nhiên, nếu tập dữ liệu không được phân phối bình thường, thì tập dữ liệu lớn hơn kích thước mẫu là 30

Step-by-step explanation:

Khi cỡ mẫu bằng hoặc lớn hơn 30 thì phân phối chuẩn.

Tuy nhiên, nếu tập dữ liệu không được phân phối bình thường, thì tập dữ liệu lớn hơn kích thước mẫu là 30

5 0
3 years ago
A rectangle is 2 times longer than it is wide. The diagonal of the rectangle is 15 cm. What is the width of the
Over [174]
This is fairly simple. Just do 2x15 to get your answer 2x15=30. Explanation if it is 2 times longer you would do 2 and then when it says it is 15 diagonal that is where the 15 comes in and it would be 2x15. So your answer is 30
8 0
3 years ago
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ALGEBRA 1, SEMESTER 2- please help, im failing my class already
Maru [420]

Velocity is given as 80 feet per second, so replace V with 80.

The rocket is launched from the ground so the initial height is 0, so replace h with 0


The formula now becomes" h(t) = -16t^2 + 80t +0


To find the maximum we need to find the coordinates of the vertex by finding the axis of symmetry:

-b/2a = -80/(2*-16) = -80/-32 = 2.5

This represents the amount of time for the rocket to reach maximum height.

So we now replace t in the equation with 2.5 and solve for the height:

h(2.5) = -16(2.5)^2 + 80(2.5)

h(2.5) = 100


The maximum height is 100 feet

4 0
3 years ago
How many solutions will the following system of linear equations have? –2x + 4y = –7 y= -1/2x + 5 A. 0 B. 1 C. 2 D. infinite
FinnZ [79.3K]

Answer:

B. 1

Step-by-step explanation:

they only cross at one point... look below

7 0
3 years ago
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Which fraction is less than the fraction represented by the model?
nevsk [136]

Answer:

fraction represented by model = 5/8

fraction less than model = 2/4

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