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sweet-ann [11.9K]
3 years ago
11

What is the value of y?Y + 30°A. 85°B. 55 c. 110°D. 10°​

Mathematics
2 answers:
yuradex [85]3 years ago
8 0

Answer:

B. 55°

Step-by-step explanation:

Note that the total angle measurements of a triangle is = 180°.

Add all the measurements together:

40 + y + 30 + y = 180

Simplify. Combine like terms:

(40 + 30) + (y + y) = 180

70 + 2y = 180

Isolate the y. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS. First subtract, then divide.

Subtract 70 from both sides:

70 (-70) + 2y = 180 (-70)

2y = 180 - 70

2y = 110

Divide 2 from both sides:

(2y)/2 = (110)/2

y = 110/2

y = 55

B. 55° is your answer.

~

Leni [432]3 years ago
3 0

Answer: The answer is B, 55 degrees.

Step-by-step explanation:

You substitute 55 into y, making it 55+85, +55, +40, making it 180 degrees. Since all sides in a triangle add up to 180, B is your correct answer.

Hope that helps!

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Alex

Answer:

option 2

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Step-by-step explanation:

4 0
4 years ago
2) Last Friday Trevon had $29. Over the weekend he received some money
OverLord2011 [107]

Answer:

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Step-by-step explanation:

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3 years ago
I need help with this if you get it right I will mark you
Arlecino [84]

9514 1404 393

Answer:

  D  9/DF = 18/16

Step-by-step explanation:

Corresponding sides are proportional. The proportions based on a given similarity statement can be written 4 ways.

For these isosceles triangles, the similarity statement could be written either of two ways:

  ΔDEF ~ ΔABC  or  ΔDEF ~ ΔCBA

Corresponding sides will depend on the similarity statement you use. Using the first one, they are ...

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  EF and BC (long sides)

For each (short side, long side) pair, we can write the proportion 4 ways:

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Using the other pair of long sides, or using the other similarity statement, the numerical proportions are the same as the ones listed above.

4 0
3 years ago
Find the sum of the first 9 terms in the following geometric series.<br> 64+32+16+...
Alex777 [14]

Answer:

127.75

Step-by-step explanation:

In this geometric series, it is clear that every number is half of the previous number. From that, we can continue on the series as shown below...

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The series above is 9 total terms. We can add those together to get our answer.

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5 0
3 years ago
Find the area of the circle. Round your answer to two decimal places, if necessary.
Arlecino [84]

Answer:

Step-by-step explanation:

The equation for the area of a circle is A=\pir^{2}.

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We were given the diameter of the circle not the radius, so we need to solve for the radius.

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Now round to two decimal places.

28.27mm

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2 years ago
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