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3 years ago

A regular triangle rotated about its center by 360 degrees maps onto itself at

Mathematics

1 answer:

grin007 [14]3 years ago

7 0

Answer:

there is a lot of different rotations

Step-by-step explanation:

and multiple of 360 and could go infinitely while 90, 180, 270 degrees will not work.

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You perform 7000 significance tests using a significance level of 3%. Assuming that the null hypothesis is true, how many of the

mr Goodwill [35]

Answer:

210

Step-by-step explanation:

we have given significance level α=3% =0.03

level of significance is nothing but the chances of rejecting a null hypothesis by the test when it given that it is correct. it is denoted by α it also defined as the

level of significance =1 - confidence level

now statistically significant test =0.03×7000=210

so the expected value of statistical significant is 210

4 0

4 years ago

Wakakawkdklwdalkjdsmf

Sergeu [11.5K]

Answer:

1. A is correct 2. d is correct

Step-by-step explanation:

1. 11.25x 3 = 33.75

3 0

3 years ago

Guys I need help on all three please

kodGreya [7K]

Answer:

graph 1 proportional

graph 2&3 is non proportional

i think

6 0

3 years ago

Solve for x: 3(2x -3 ) = -7x

Artyom0805 [142]

The Answer is 9/13
Solving Steps :

3(2x-3)=-7x

6x-9=-7x

6x+7x=9

13x=9

X=9/13

6 0

3 years ago

The average thickness of books on a library shelf is 8.3 centimeters. The standard deviation is 0.6 centimeter. If 20% of the bo

jeka57 [31]

Answer:

8.8 cm

Step-by-step explanation:

-We know that the top 20% of the books are oversized.

-We therefore find the z-value of the top 20%:

$z_{0.1}=8.4$

#We substitute the z value in formula to solve X.

$z=\frac{\bar X-\mu}{\sigma}$

Where

X is the minimum thickness of the book.

-Given $\sigma=0.6 \ , \mu=8.3$ , the minimum thickness,X can be calculated as follows:

$z=\frac{\bar X-\mu}{\sigma}\\\\0.84=\frac{\bar X-8.3}{0.6}\\\\\bar X=0.84\times 0.6+8.3\\\\=8.804\approx 8.8\ cm$

Hence, the minimum thickness of the oversized books is 8.8 cm

3 0

4 years ago