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lawyer [7]
3 years ago
10

(Will mark brainliest) Please help as soon as possible for 30 points

Mathematics
2 answers:
Marianna [84]3 years ago
7 0

Answer:

90

Step-by-step explanation:

a triangle's angles all add up to 180. take 51 and 39 away from 180 and you get 90

n200080 [17]3 years ago
7 0

Answer: 90 degrees

Step-by-step explanation:

Theorem:

a+b+c=180 degrees

39 degrees + 51 degrees + x degrees = 180 degrees

39 + 51 = 90

180 - 90 = 90

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A frightened dot ran from −5 to 34. What distance did it cover? If the whole run took the dot 3 minutes, what was its average sp
jonny [76]

Answer:

<u>The average speed of the frightened dot was 13 units per minute.</u>

Step-by-step explanation:

Let's find out the distance covered by the frightened dot, as follows:

Distance = (Distance from - 5 to 0) + (Distance from 0 to 34)

Distance = 5 + 34

Distance = 39

Now, let's find out the average speed of the dot, this way:

Average speed = Distance/Time

Average speed = 39/3

<u>Average speed = 13 units per minute</u>

7 0
3 years ago
Anyone know the answer?
chubhunter [2.5K]

Here is the answer.

You just have to remember the given formula.

3 0
3 years ago
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15. Find the length of segment DE of the triangle ABC.
ruslelena [56]

Answer:

Option C. 26\ units

Step-by-step explanation:

we know that

Triangles ADE and ABC are similar by AA similarity postulate

AB=2AD

Apply proportion

\frac{AD}{AB}=\frac{8x-6}{12x+4}\\ \\\frac{AD}{2AD}=\frac{8x-6}{12x+4}\\ \\\frac{1}{2}=\frac{8x-6}{12x+4}\\ \\12x+4=16x-12\\ \\16x-12x=4+12\\ \\4x=16\\ \\x=4\ units

Find the length of segment DE

DE=8x-6=8(4)-6=26\ units

4 0
3 years ago
Sophia has been trying to budget her money. She just opened a bank account and deposited
Karolina [17]

Answer:

400 - 120 - 220 -175 -60 +50 = -125

Step-by-step explanation:

4 0
3 years ago
A rhombus diagonals bisects opposite <br>a)angles <br>b)line​
hichkok12 [17]

Answer:

The answer to this question is angles

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3 years ago
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