All categories

3 years ago

PLZ ANSWER QUICK IT WILL HELP A LOT!

Mathematics

2 answers:

tekilochka [14]3 years ago

6 0

Answer:

<em>Correct answer: Choice a.</em>

Step-by-step explanation:

<u>Reflections In The Coordinate Plane </u>

Reflect over the x-axis:

When we reflect a point across the x-axis, the x-coordinate remains the same, but the y-coordinate is mapped to its opposite (its sign is changed).

The reflection of the point (x,y) across the x-axis is the point (x,-y).

Reflect over the y-axis:

When reflecting a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is mapped to its opposite (its sign is changed).

The reflection of the point (x,y) across the y-axis is the point (-x,y).

Note that the original triangle drawn by Jack and the image triangle have the same y-coordinate, but the inverse of the x-coordinate. This matches the definition of a reflection over the y-axis.

Correct answer: Choice a.

OlgaM077 [116]3 years ago

4 0

Answer: A

Step-by-step explanation: all answer choices have the negative sign for the x-value

You might be interested in

Use substitution to solve each system of equations.

uysha [10]

answers are in the pictures

7 0

2 years ago

4(2x + 1) = 2(x - 13)

MakcuM [25]

The answer would be -5.

4 0

3 years ago

2) Find each angle measure to the nearest degree

UNO [17]

Answer: AB=7.74in.;m<A

=57*;m<B=33*

Step-by-step explanation

this symbol means degrees *

8 0

2 years ago

To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine fo

Anni [7]

Answer:

The 90% confidence interval for the mean nicotine content of this brand of cigarette is between 20.3 milligrams and 30.3 milligrams.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 9 - 1 = 8

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 8 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.9}{2} = 0.95$ . So we have T = 1.8595

The margin of error is:

M = T*s = 1.8595*2.7 = 5

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 25.3 - 5 = 20.3 milligrams

The upper end of the interval is the sample mean added to M. So it is 25.3 + 5 = 30.3 milligrams.

The 90% confidence interval for the mean nicotine content of this brand of cigarette is between 20.3 milligrams and 30.3 milligrams.

7 0

3 years ago

What is the pattern 3.5 to 13

mars1129 [50]

Adding 9.5 every time

4 0

3 years ago