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3 years ago

Pentagon PQRST and its reflection, pentagon P'Q'R'S'T', are shown in the coordinate plane below:

2 answers:

7 0

Yes, the answer is A. x=0. Another way to say "reflect across the y-axis" is to say "reflect across the line x=0" since the line created by graphing x=0 is the same as the y-axis. An image that is a reflection across the y-axis, or across the line x=0, will have opposite x-coordinates from the pre-image but identical y-coordinates. In other words, the x value points just changed signs from negative to positive values since it went through the rule (x, y) → (−x, y).

Ad libitum [116K]3 years ago

4 0

<span>I have graphed the given coordinates of both pentagons. The reflection was across the y-axis where coordinates of Pentagon PQRST (-x,y) resulted to Pentagon P'Q'R'S'T' (x,y). The line of reflection between the pentagons was x = 0. Line of reflection is the midway between the pre-image and its reflection.</span>

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Im not sure of the answer but its easy

tamaranim1 [39]

Given:

On a number line, point A is at -6 and point B is at 7.

To find:

The distance between point A and point B.

Solution:

In the given number line,

Point A = -6

Point B = 7

We need to find the difference between point A and point B to find the distance between them.

Since 7 > -6. therefore,

$\text{Distance}=B-A$

$\text{Distance}=7-(-6)$

$\text{Distance}=7+6$

$\text{Distance}=13$

Hence, the distance between point A and point B is 13 units.

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3 years ago

Original amount: 9<br> new amount: 6

Rina8888 [55]

Answer:

-3

Step-by-step explanation:

you subtracted 3 from the original amount

7 0

3 years ago

Can someone hlpe with questions A and/or B please

pickupchik [31]

Let sample in Texas be p1, Louisiana be p2.
Null Hypothesis:
p1 - p2 = 0
Alternative Hypothesis: (This represents the claim)
p1- p2 < 0

To calculate test statistic, you need the pooled estimate which is a weighted average of the 2 sample proportions.
$P = \frac{n_1 p_1 + n_2 p_2}{n_1 + n_2} = \frac{2000(.179+.265)}{2000+2000} = 0.222$
Next get standard error:
$SE = \sqrt{P(1-P)(\frac{1}{n_1} + \frac{1}{n_2})} = \sqrt{.222(1-.222)(\frac{1}{2000}+\frac{1}{2000})} = 0.01314$
Calculate test statistic:
$Z = \frac{p_1 - p_2}{SE} = \frac{.179 - .256}{.01314} = -5.86$
To find p-value, look up Z-value in standard normal table.
Anything smaller than -3 or larger than 3, you can estimate to have
p-value = 0.

If p-value < alpha, Reject Null Hypothesis.
For this example, 0 < 0.05, therefore reject null hypothesis.

There is evidence to support claim that proportion of smokers in Texas is LESS than Louisiana.

5 0

3 years ago

I don't really understand help would be great

Kay [80]

A is the right answer

8 0

2 years ago

What is the mapping notation that will transform triangle ABC to triangle A'B'C'?

Kaylis [27]

Answer:

The transformation is (y,-x)

Step-by-step explanation:

To know the mapping notation, we need to know the coordinates of the image and the pre-image

For the pre-image, we have;

A(3,8)

B(6,8)

C(6,2)

For the image, we have

A’( 8,-3)

B’ (8,-6)

C’ (2,-6)

So let us try and get the transformation from the coordinates

We can see that this is;

(x,y) to (y,-x)

3 0

2 years ago