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MakcuM [25]
3 years ago
10

Solve 9x^2 + 6 = 12x.

Mathematics
1 answer:
Kryger [21]3 years ago
3 0
The answer to this question is
C
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How do you do this problem? Please explain.
horrorfan [7]

Answer:  8.632

<u>Step-by-step explanation:</u>

First, you need to find the length of AE. Since ΔAEC is a right triangle, we can use:

sin\ C=\dfrac{AE}{AC}\\\\\\sin\ 50 = \dfrac{AE}{5}\\\\\\5\ sin\ 50=AE\\\\3.83=AE

Next, Use Heron's formula to find the Area of ΔADE.

  • AE = 3.83
  • ED = 6
  • AD = 9

Heron's formula is:

A=\sqrt{s(s-a)(s-b)(s-c)}\quad \text{where}\ s = \dfrac{a+b+c}{2}\\\\s=\dfrac{AE+ED+AD}{2}=\dfrac{3.83+6+9}{2}=\dfrac{18.83}{2}=9.415\\\\A=\sqrt{9.415(9.415-3.83)(9.415-6)(9.415-9)}\\\\.\quad=\sqrt{9.415(5.585)(3.415)(0.415)}\\\\.\quad=\sqrt{74.519}\\\\.\quad=8.632

5 0
3 years ago
What are the steps to construct parallel lines using a compass and straightedge.
kari74 [83]

The first thing you do is draw a straight line. It can be any length. Then draw a point above the line. Place the stylus of the compass on the point, and swing the compass down to make two marks on the line. Then, draw marks below the line, by placing the stylus on the points of intersection. Draw a line from where these two meet to the original point.Mark two points on the 2nd line by placing the compass stylus on the original dot, and swinging it down and up. Then, swing the compass from both of these new points of intersection , on either side of the line, to form 2 new points.Connect these 3 points, and now you have 2 parallel lines! The original line and the most recently made are parallel with each other. Hope this helps!

5 0
3 years ago
I NEED HELP ASAP. PLEASE AND THANK YOU
Andrej [43]

Answer:

1, 2, and 5

Step-by-step explanation:

5 0
3 years ago
Whoever answers the question first I'll choose them as brainliest​
sattari [20]
The answer is 60, cross multiply
8 0
3 years ago
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One and six tenths as a decimal
Brums [2.3K]

Answer:

1.6

Step-by-step explanation:

1 and 6/10 = 1.6 as a decimal

8 0
3 years ago
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