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Svetllana [295]
3 years ago
11

Judy began her proof of the converse of the Pythagorean theorem by drawing triangle ABC with side lengths in inches of 5, 12, an

d 13. She then showed that 5^2 + 12^2=13^2 as follows.
5^2+12^2=13^2
25+144=169
169=169

Next, she drew triangle DEF, with two of the sides forming a 90° angle. If she has done her proof correctly so far, which of these is a length of one of the sides forming the 90° angle? Select two that apply.

A.3 in
B.4 in
C.5 in
D.12 in
E.13 in
Mathematics
2 answers:
fiasKO [112]3 years ago
6 0

Answer:

5 and 12

Step-by-step explanation:

The 90 degree angle is opposite the hypotenuse, -> in other words it's between the two legs.

kati45 [8]3 years ago
5 0

Answer:

5 and 12

Step-by-step explanation:

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Well just how many times. That doesn't make much sense
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3.
Zanzabum

Answer:

see below

Step-by-step explanation:

y = 8x − 9

y = 4x − 1

Since both equations are equal to y, we can set them equal to each other

8x-9 = 4x-1

Subtract 4x from each side

8x-4x-9 = 4x-4x-1

4x-9 = -1

Add 9 to each side

4x-9+9 = -1+9

4x = 8

Divide each side by 4

4x/4 = 8/4

x=2

Now find y

y = 4x-1

y = 4(2)-1

y = 8-1

y = 7

(2,7)

The point of intersection when the 2 lines are graphed is (2,7)

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Surface area length 9 depth 4 width 5
Vitek1552 [10]
To find surface area, we have to find the area of each surface of the shape.

to find the side’s area, multiply length x width (9 x 4). the side rectangle = 36 cm^2

to find the back side’s area, multiply 4 x 5 = 20 cm^2

now, just multiply each of those based on how many times each appear in the figure

there are 4 rectangles congruent to the front one - so 4 x 36 cm^2 = 144 cm ^2

there are 2 rectangles congruent to the back one - so 2 x 20 cm^2 = 40 cm^2

now that we have the area of all the surfaces, simply add them together: 40 cm^2 + 144 cm^2 = 184 cm^2

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3 0
3 years ago
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A used-car dealer has a vehicle on the lot with a sticker price of $5999. If the
Digiron [165]

Answer:

$4999

Step-by-step explanation:

Let the cost of the car be x

<u>Then considering 20% markup, the sticker price is:</u>

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<u>Since 20% of x is 20/100x = 0.2x,</u>

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3 0
3 years ago
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