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3 years ago

Please help!!!!!!!!!

Mathematics

1 answer:

nadya68 [22]3 years ago

7 0

Step-by-step explanation:

0.002

ones is 0

tenths is 0

hundreths is 0

thousandths is 2

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On the grid draw a scaled copy of quadrilateral ABCD with a scale factor 2/3

Tamiku [17]

Answer:

Attached diagram A'B'C'D'

Step-by-step explanation:

Given is a quadrilateral ABCD. It says to draw a dilated version with a scale factor 2/3.

We see that scale factor is less than 1 which means it shrinks the image to a smaller one.

To draw a scaled copy, we need to find the lengths of its sides.

To do so, we can draw the diagonals AC & BD, and they intersect at origin O(0,0) such that OA= -2, OB= 2, OC= 4, OD= -4.

Applying a scale factor of 2/3, we get OA' = -4/3, OB' = 4/3, OC' = 8/3, OD' = -8/3.

So we have attached a scaled copy A'B'C'D' of quadrilateral ABCD with a scale factor 2/3.

6 0

3 years ago

A study done by researchers at a university concluded that 70 70% of all student athletes in this country have been subjected t

Alecsey [184]

Answer:

The margin of error is 0.0206 = 2.06 percentage points.

The 95% confidence interval for the proportion of all student athletes in this country have been subjected to some form of hazing is (0.6794, 0.7206).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 1900, \pi = 0.7$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$M = 1.96\sqrt{\frac{0.7*0.3}{1900}} = 0.0206$

The margin of error is 0.0206 = 2.06 percentage points.

The lower limit of this interval is:

$\pi - M = 0.7 - 0.0206 = 0.6794$

The upper limit of this interval is:

$\pi + M = 0.7 + 0.0206 = 0.7206$

The 95% confidence interval for the proportion of all student athletes in this country have been subjected to some form of hazing is (0.6794, 0.7206).

6 0

4 years ago

Change one fraction in each pair so that they have the same denominator then rewrite the fraction IE: 1/4 and 3/8 after that whi

LiRa [457]

1/4 would be 2/8 so the 3/8 is greater

8 0

3 years ago

4.5 times what, equals 30

AlladinOne [14]

45 x 6.666... = 30

Hope this helps :)

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3 years ago

Read 2 more answers

What's the equivalent to the expression of (3×-8)

Zarrin [17]

That expression is equivalent to 1/2(6-16) because since you are distributing 1/2 you are going to divide 6 and -16 by 1/2 and that will give you 3x-8

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4 years ago