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kirill115 [55]
3 years ago
7

PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!!

Mathematics
1 answer:
nalin [4]3 years ago
4 0
The answer is: cosV=39/89=0,43
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Need quickly please help!
yaroslaw [1]
<h3>Answer:  D) 5</h3>

=======================================================

Work Shown:

We use the intersecting chords theorem

(AH)*(HG) = (FH)*(HB)

(x-2)*(x+7) = (2x-1)*(4)

x*(x+7) - 2(x+7) = 4(2x-1)

x^2+7x - 2x - 14 = 8x - 4

x^2 + 7x - 2x - 14 - 8x + 4 = 0

x^2 - 3x - 10 = 0

(x - 5)(x + 2) = 0

x-5 = 0 or x+2 = 0

x = 5 or x = -2

If x = -2, then AH = x-2 = -2-2 = -4, but having a negative segment length is not possible. Lengths must be positive. So we ignore x = -2

If x = 5, then we find the following lengths

  • AH = x-2 = 5-2 = 3
  • HG = x+7 = 5+7 = 12
  • FH = 2x-1 = 2*5-1 = 9

Then note how AH*HG = 3*12 = 36 while FH*HB = 9*4 = 36. This confirms that (AH)*(HG) = (FH)*(HB) is a true equation and confirms we have the correct x value.

7 0
3 years ago
What is f(x)=2x-1 if x=0
mrs_skeptik [129]

Answer:

f=\frac{2x-1}{x}

Step-by-step explanation:

3 0
3 years ago
1.) A school wants to have a metal gate placed around it. However they only want to cover three sides of the school and they onl
kogti [31]

Answer:

I only have an answer to number 2 but the dimensions are 20 and 120.

Step-by-step explanation:

well you can remove the zeroes and factor either the 28 or 24. (I think 24 is the best) so when you factor it you get 2 and 12 because 2 x 12 is 24 and 2 + 2 + 12 + 12 is 28. Then add the zeroes and you have your dimensions. I hope that explanation helped with number 2.

8 0
3 years ago
17 - 3 x (-2²) - (-6²) x (-1⁷) = <br><br> me ajudem por favor
scZoUnD [109]
Hola! Aquí mi respuesta;

17-3 x (-2^2)-(-6^2) x (-1^7)

17+3x4+6^2x(-1)

17+12-6^2

17+12-36

-7

7 0
4 years ago
The Perez family bought4 crates of eggs last week. Each crate had 18 eggs. Since then, they have eaten 26 of the eggs. How many
agasfer [191]

Answer:

There are 46 eggs left

Step-by-step explanation:

18 x 4 = 72 - 26 = 46

8 0
2 years ago
Read 2 more answers
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