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Varvara68 [4.7K]
2 years ago
11

the perimeter of an equilateral triangle is 63 inches. if the length of each side is (4x-3), find the value of x

Mathematics
1 answer:
Ber [7]2 years ago
4 0
Use the equation 4x-3=63
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What is the area of a triangle with vertices (3,0) (9,0) (7,6)
Nezavi [6.7K]

Answer:

The area of the triangle is of 21 units of area.

Step-by-step explanation:

The area of a triangle with three vertices (x_1,y_1),(x_2,y_2),(x_3,y_3) is given by the determinant of the following matrix:

A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|

In this question:

Vertices (3,0) (9,0) (7,6). So

A = \pm 0.5 \left|\begin{array}{ccc}3&0&1\\9&0&1\\7&7&1\end{array}\right|

A = \pm 0.5(3*0*1+0*1*7+1*9*7-0*7*1-0*9*1-3*1*7)

A = \pm 0.5*(63-21)

A = \pm 0.5*42 = 21

The area of the triangle is of 21 units of area.

5 0
2 years ago
I have been stuck on these 2 questions for 10 minutes!​
yanalaym [24]
The answers are:

13. |3y|=9, y<0

14. |x|=2, x>0
4 0
3 years ago
Translate "Three is less than thirty-seven into a mathematical expression
uysha [10]
3 < 37
I hope this helps you!
5 0
3 years ago
The cost of the ski team's trip is represented by the question: Where
Elina [12.6K]
The answer is: 30 skiers were participating in the ski trip.

Method:

$50S = $1,850 - $350 = $1,500

S = 1,500/50 = 30

Therefore, 30 skiers went on the trip

8 0
2 years ago
What’s the answer ?
svlad2 [7]

Answer:

40

Step-by-step explanation:

lining them up:

19, 19, 22, 25, 27, 31, 32, 32, 40

We can see that 27 is in the middle when h is 40

7 0
2 years ago
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