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erastovalidia [21]
2 years ago
9

Help with pre algebra

Mathematics
2 answers:
Firdavs [7]2 years ago
5 0

Answer:

Y-axis

Step-by-step explanation:

B is a reflection of point A across the<em>Y-</em>axis. The vertical line is Y and the horizontal line is X.

olganol [36]2 years ago
4 0

Answer:

The y-axis.

Step-by-step explanation:

This is because it is mirroring across the y-axis, and the x-coordinate's sign is getting changed from positive to negative.

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The ratio of the measures of three angles is 3:8:9. find the measure of each angle of the triangle.
MAXImum [283]

To solve this problem you must apply the proccedure shown below:

1. You have that the ratio of the measures of the three angles is 3:8:9

2. The sum of the interior angle of a triangle is 180degrees

3. Let's say that the measure of each angle is x multiplied by the ratio. Therefore, you can write the following equation and solve for x:

3x+8x+9x=180\\ x=9

4. Therefore, the measure of each angle is:

3(9)=27degrees\\ 8(9)=72degrees\\ 9(9)=81degrees

The answer is: 27degrees, 72degrees,81degrees

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3 years ago
Recall the formula for the area of a trapezoid, A=1/2h(a+b) , where h is the height and a and b are the lengths of the parallel
Gekata [30.6K]

Answer:

The area of the trapezoid is 40 square inches

Step-by-step explanation:

Here, we want to find the area of the given trapezoid

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Substituting these values, we have that ;

A = 1/2(10 + 6)5

A = 1/2(16)(5)

A = 40 square inches

7 0
2 years ago
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Janet is designing a garden in the shape of a trapezoid which is split into three parts: two triangular
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Step-by-step explanation:

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D) EFGH moved onto E'F'G'H after rotating 180 counterclockwise around the origin and the reflecting across the y-axis.

<h3>How to carry out transformations?</h3>

From online resources gotten about this question, for quadrilateral EFGH and quadrilateral E'F'G'H to be congruent, what we must do first is to rotate 180° counterclockwise around the origin and then move EFGH onto E'F'G'H'.

The last step to get this proof of congruency is to reflect across the y-axis.

Read more about transformations at; brainly.com/question/4289712

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