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Phoenix [80]
3 years ago
15

Please answer ( 8th grade math )

Mathematics
1 answer:
maxonik [38]3 years ago
5 0
The answer is C you just add both angles together and subtract the sum by 180 because that’s what triangles equal to. Leaving you with the answer of 78°! hope this helped :)
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The proof, with a missing reason, proves that the measure of angle ECB is 54°.
aniked [119]

Answer:

Midsegment of a Triangle Theorem

Step-by-step explanation:

In\: \triangle ADE\\m\angle A + m\angle D + m\angle AED = 180°\\\therefore 90°+36°+m\angle AED= 180°\\\therefore 126° +m\angle AED = 180°\\\therefore m\angle AED = 180°-126°\\\therefore m\angle AED = 54°\\

In\: \triangle ADE, D and E are mid points of sides AB and AC respectively.

Therefore, DE || BC

Hence, by Midsegment of a Triangle Theorem

m\angle ACB = m\angle AED =54°(corresponding\:\angle 's) \\\therefore m\angle ECB = m\angle AED =54°(\because A - E - C)

3 0
3 years ago
Part 1
vekshin1

Divide bags of sand by gallons of water:

14 /6 = 2.33

21/9 = 2.33

The ratio is the same, so this means for every gallon of water you need 2.33 bags of sand.

Convert the fractions into decimals and you will get 7/3 = 2.33

The answer for Part 1 is D) 7/3

For part 2, multiply the gallons of water by 2.33 to get the number of sand bags needed:

12 x 2.33 = 27.99, which rounds to 28.

The answer is C) 28 bags.

5 0
3 years ago
Read 2 more answers
What is the equation of the line?
Natali5045456 [20]

x = 72

Step-by-step explanation:

7 0
3 years ago
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How many solutions does the equation 5x-8=3x+8​
posledela

Answer:

One solution

Step-by-step explanation:

5x-8 = 3x+8

2x = 16

x = 8 = true once

5 0
3 years ago
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The selling price of the Robertsons family house dropped from $500,000 to $250,000. What was the percent decrease in the value o
Alexus [3.1K]

Answer:

50%

Step-by-step explanation:

You can literally do it mentally lol

 $500,000

- <u>$250,000</u>

 $250,000

so by common sense, it's 50%

Hope it helped!

5 0
3 years ago
Read 2 more answers
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