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butalik [34]
3 years ago
10

A side of the triangle below has been extended to form an exterior angle of 129°. Find the value of x.

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
6 0

Answer:

51

Step-by-step explanation:

Since the angle of a line is 180 degrees all we need to do is substract 129 from 180 and we have the answer for x

180-129=51

nadya68 [22]3 years ago
4 0

129° + x = 180°. [Linear pair]

=> x = 180° - 129°

=> x = 51°

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A store advertises 15% off an item that regularly sells for $300.
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The sale price of the item is  $ 255

Step-by-step explanation:

To determine the amount of discount ( d ) offered by the store, we calculate  

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d  =  3 00  ×  15  ÷ 1 00  (take the 2 zeros out on both the hundred and 3 hundred)

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2 years ago
Please help asap tysm <3
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5 0
2 years ago
Find the area of the shape below.
fgiga [73]

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What is the sum of the first seven terms of the geometric series 2 - 10 +50 -...?
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Answer:

26042.

Step-by-step explanation:

What's the first term of this geometric series?

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What's the common ratio of this geometric series?

Divide one of the terms with the previous term. For example, divide the second term -10 with the first term 2.

\displaystyle r = \frac{-10}{2} = -5.

What's the sum of this series to the seventh term?

The sum of the first n terms of a geometric series is:

\displaystyle a_1 \cdot \frac{1-r^{n}}{1-r},

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\displaystyle 2 \times\frac{1- (-5)^{7}}{1- (-5)}=26,042.

3 0
3 years ago
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