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const2013 [10]
3 years ago
15

1-99 -- Calculate all the missing angle measures in the diagrams below​

Mathematics
1 answer:
ira [324]3 years ago
5 0
Ok give me a second.
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A department store buys 300 shirts at a cost of ​$2,100 and sells them at a selling price of ​$10 each. Find the percent markup
denis23 [38]

Answer:

markup 3 dollars a shirt. Total markup 900$

Step-by-step explanation:

4 0
2 years ago
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Write down the 3rd term in the sequence given by: T(n) = n2 + n
Sergio [31]
The solution for the problem is:
I will first get the first five terms so that I could easily locate the third term of this problem:So, substituting the values:
T(1) = 1^2 = 1T(2) = 2^2 = 4T(3) = 3^2 = 9T(4) = 4^2 = 16T(5) = 5^2 =25
So the third terms is T(3) = 3^2 = 9
8 0
3 years ago
A triangle has an angle that measures 90 degrees what type of triangle could it be​
vekshin1

A triangle that has an angle that measures 90 degrees would be a Right Triangle.

6 0
3 years ago
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Can u help me plssss
Anastaziya [24]

Answer:

120 I think.

Step-by-step explanation:

Because 10*12=120

3 0
3 years ago
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Solve the following triangle in which given sides are<br> a=7 b=7 c=9
blagie [28]
We have an isosceles triangle;
A=opposite angle side a.
B=opposite angle side b.
C=opposite angle side c.

A=B
Method 1:

We can divide the isosceles triangle in two right triangles,
hypotenuse=7
side=9/2=4.5

B=A=arccossine (4.5/7)=49.994799...º≈50º
C/2=90º-50º=40º  ⇒ C=2*40º=80º

Answer:
a=7;  A=50º
b=7;  B=50º
<span>c=9;  C=80º

Method 2:
Law of cosines:
a²=b²+c²-2bcCosA  ⇒CosA=(a²-b²-c²)/(-2bc)
CosA=(49-49-81) / (-126)=0.642857
A=arco cos (81/126)≈50º

B=A=50º

A+B+C=180º
50º+50º+C=180º
C=180º-100º
C=80º

Answer:

</span>a=7;  A=50º
b=7;  B=50º
<span>c=9;  C=80º</span>

8 0
3 years ago
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