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Tasya [4]
3 years ago
15

Quick anyone know the answer?

Mathematics
1 answer:
den301095 [7]3 years ago
8 0
The sum of the measures of angles in all quadrangles is 360 °. Therefore:

(25x+1)+(25x-2)+(20x-1)+82=360\\\\70x+80=360\ \ \ |-80\\\\70x=280\ \ \ |:70\\\\x=4

m\angle D=(20x-1)^o\to m\angle D=(20\cdot4-1)^o=79^o\\\\Answer:\ B.\ 79^o

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Numerical coefficient of the term x over 7
Over [174]

Answer:

  1/7

Step-by-step explanation:

In the term x/7, the numerical multiplier of x is 1/7.

3 0
4 years ago
The pyramid shown has a square base that is 1212 centimeters on each side. The slant height is 1818 centimeters. What is the sur
S_A_V [24]

Answer : Surface area of pyramid = 4406832 square cm.

Explanation :

Since we have given that

Side of square base = 1212 cm

Slant height of pyramid = 1818 cm

As we know that ,

\text{Surface area of pyramid }=\frac{1}{2}\times perimeter\times \text{ slant height}

\text{ Since, perimeter of square }=4\times side\\=4\times 1212\\=4848 cm

Now,

\text{ Surface area of pyramid }= \frac{1}{2}\times 4848\times 1818\\\\\text{ Surface area of pyramid }=4406832\text{ square cm}

Hence, surface area of pyramid = 4406832 square cm.


5 0
3 years ago
---8 (-5 + 13) + 12 : 6 x 2
madreJ [45]

Step-by-step explanation:

-8 ( - 5 + 13) + 2 : 1 x 2

-8 ( 8) + 2 : 2

-64 + 1

-63

6 0
3 years ago
What is -8/9 as a decimal​
kari74 [83]

Answer:

-0.89

Hope I helped

7 0
3 years ago
3- blank = 11<br><br> Please help
Fantom [35]

Answer:

14

Step-by-step explanation:

3+11=14

soo that is the answer (i read it correctly it is the right answer)

6 0
3 years ago
Read 2 more answers
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