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s344n2d4d5 [400]
3 years ago
9

Calculate the area of the regular pentagon below:

Mathematics
2 answers:
KIM [24]3 years ago
5 0
The answer is 858.55 because A=145(5+25)a2
ch4aika [34]3 years ago
5 0

Answer:

888888555555555558888888888888888888888888888888888888888899....555 C lol fllow my tt tvdlover21 and helpingyou2shift

Step-by-step explanation:

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A triangle has sides of lengths 9,7, and 12. Is it a right triangle? Explain.
dusya [7]
Answer: No, it is not a right triangle.

Explanation:
9^2 + 7^2 (?) 12^2

81 + 49 (?) 144

130 = 144

Since 12^2 = 144, and the square root of 130 is 11.4^2, it is not a right triangle.
8 0
3 years ago
15.7 is it a rational,natural,whole, integer etc?​
taurus [48]

Answer:

Rational because it is a decimal that can be seen as a fraction.

Step-by-step explanation:

8 0
4 years ago
Norma has an A-frame cabin.The back is shown below. How many square feet of paint will she need to cover the back of the cabin?
a_sh-v [17]
I FOUND YOUR FULL QUESTION IN OTHER FUENETES.
 PLEASE SEE ATTACHED IMAGE. 
 For this case what you should do is find the area of the triangle which will be given by:
 A = (1/2) * (b) * (h)
 Where
 b: base
 h: height
 Substituting the values we have:
 A = (1/2) * (25 1/2) * (15)
 A = 191.25 feet ^ 2
 Answer:
 she will need 191.25 feet ^ 2 to cover the back of the cabin

7 0
4 years ago
What is the vertex of the graph of f(x) = x2 + 10x - 9? A) (-5, -34) B) (-5, -9) C) (5, -9) D) (5, 66)
sukhopar [10]

Answer:

A) (-5, -34)

Step-by-step explanation:

f(x) = x^2 + 10x - 9

We complete the square to get the equation in vertex form

Take the coefficient of the x term and divide by 2 then square it.  We add it and then subtract it not to change the value of the equation

f(x) = x^2 + 10x +(10/2)^2 - (10/2)^2 - 9

f(x) = x^2 +10x +25 -25 -9

f(x) = (x^2 +10x +25) -34

The term in parentheses simplified to (x+10/2) ^2

     = (x+5)^2 -34

   = (x - -5)^2 -34

This is in the form (x-h)^2 +k

The vertex is (h,k)  h=-5 and k=-34

(-5,-34)

4 0
3 years ago
Read 2 more answers
HELP!! I'LL GIVE YOU BRAINLIEST!
My name is Ann [436]

Answer:

25, -13, -6.3, -7.8, -1.9, 2, 7.8

Step-by-step explanation:

5 0
3 years ago
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