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sattari [20]
3 years ago
7

 If the trapezoid below is reflected across the x-axis, what are the coordinates of B'?

Mathematics
2 answers:
Grace [21]3 years ago
9 0
The x-coordinate remains the same as the x-coordinate of point B.
The y-coordinate becomes the additive inverse of the y-coordinate of point B.

Answer: B. (3, -8)

fenix001 [56]3 years ago
8 0

Answer:

B. (3,-8)

Step-by-step explanation:

We are given the trapezoid with point B having the co-ordinates (3,8).

Now, the trapezium is reflected across x-axis to form another trapezium.

Since, we have,

<em>Reflection across x-axis changes the co-ordinate (x,y) to (x,-y).</em>

So, we get,

The co-ordinates of B' are (3,-8).

Hence, option B is correct.

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Find the value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2
soldier1979 [14.2K]

The value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2 is -2

<u>Solution:</u>

Given that line is passing through point (-5, 2) and (3, r)

Slope of the line is \frac{-1}{2}

Need to determine value of r.

Slope of a line passing through point \left(x_{1}, y_{1}\right) \text { and }\left(x_{2}, y_{2}\right)  is given by following formula:

\text { Slope } m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}  --- eqn 1

\text { In our case } x_{1}=-5, y_{1}=2, x_{2}=3, y_{2}=\mathrm{r} \text { and } m=-\frac{1}{2}

On substituting the given value in (1) we get

\begin{array}{l}{-\frac{1}{2}=\frac{r-2}{3-(-5)}} \\\\ {\text { Solving the above expression to get value of } r} \\\\ {=>-\frac{1}{2}=\frac{r-2}{3+5}} \\\\ {=>-8=\frac{r-2}{3+5}} \\\\ {=>-8=2(r-2)} \\\\ {=>-8=2 r-4} \\\\ {=>2 r=-8+4} \\\\ {=>2 r=-4} \\\\ {=>r=\frac{-4}{2}=-2}\end{array}

Hence the value of "r" is -2

8 0
3 years ago
The water level at a pier is modeled by the function y= 2.5 cos(2pi/12.5) +12, where y represents the water level measured in me
ivolga24 [154]

Answer: 3.1 hours

Step-by-step explanation: Just took the quiz on edg.

3 0
4 years ago
Please help if you can
marishachu [46]

Answer:

maybe option 1st

Step-by-step explanation:

Hope this will help you dear.

3 0
3 years ago
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Scilla [17]
Woah Coy-fish woah :):);$4&&2&2!:
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3 years ago
What is the value of a?
pantera1 [17]

Answer:

a=25

Step-by-step explanation:

since angle T is 60, and angle Y is the exact same as T, it would make sense that a=25 [3(25)-15]

4 0
3 years ago
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