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Alex_Xolod [135]
3 years ago
9

ΔABC is an equilateral triangle. m∠A = (3x - 12)°. Solve for x.

Mathematics
2 answers:
Wittaler [7]3 years ago
6 0
If triangle ABC is equilateral, you know that each angle is 60 degrees because 180(the total of all angles in a triangle) divided by 3 is 60. 60 would equal 3x-12. 60=3x-12 then you cancel out the 12, 56=3x, and finally divide by 3... x=18.66! Hope this helps!
torisob [31]3 years ago
5 0
Since it is an equilateral triangle each side has to be 60 degrees in order to make the triangle equal to 180
I think that it would be 60=3x-12
then you would add 12 to the 60 giving you 72
Then finally you would divide 72 by 3 and get 24.
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Two groups of students were asked how far they lived from their school. The table below shows the distances in miles
leonid [27]
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Group B (distance in miles) 2 2.5 3.23 1.3 1.8 2.4 3 1.5 1.8

Group A mean = (1 + 1.5 + 3.03 + 3.2 + 2.8 + 1.5 + 1.8 + 2.5 + 2.2)/9 = 19.53/9 = 2.17
Group B mean = (2 + 2.5 + 3.23 + 1.3 + 1.8 + 2.4 + 3 + 1.5 + 1.8)/9 = 19.53/9 = 2.17

Therefore, the mean is equal for Group A and Group B.
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7 0
3 years ago
Read 2 more answers
This has no answer choices
levacccp [35]

Answer:

I think x eaquals 130

Step-by-step explanation:

Because if you add 50 to 130 you get 180 a a straight line is 180 hope this helps

6 0
3 years ago
What's the answers to this? I'm not sure if I am correct. HELPPPPPPP
yulyashka [42]

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3 years ago
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The equation shown below involves a perfect square trinomial. 4x2 + 20x + 25 = 7 Which of the following is a step in solving thi
fomenos
4 x^2 + 20 x + 25 = 7
Divide both sides by 4:
x^2 + 5 x + 25/4 = 7/4
Write the left-hand side as a square:
(x + 5/2)^2 = 7/4
Take the square root of both sides:
x + 5/2 = sqrt(7)/2 or x + 5/2 = -sqrt(7)/2
Subtract 5/2 from both sides:
x = sqrt(7)/2 - 5/2 or x + 5/2 = -sqrt(7)/2
Subtract 5/2 from both sides:
Answer:  x = sqrt(7)/2 - 5/2 or x = -5/2 - sqrt(7)/2
3 0
4 years ago
Find (5) for f(x) = (3)<br><br><br> a.9<br> b.3<br> c.27<br> d.81
spin [16.1K]

f(5) is 3.

Step-by-step explanation:

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⇒ f(x) = f(5) = 3

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3 years ago
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