Step-by-step explanation:
X-coordinate : (-18+0)/2 = -9.
Y-coordinate = (-2+6)/2 = 2.
Hence M(-9,2).
The last one is correct because a prism is length * width * hight
6.
4x^2 + 4 = 0
Divide both sides by 4
x^2 + 1 = 0
Use the quadratic formula since this cannot be factored.
x = (-b +- sqrt(b^2 - 4ac))/(2a)
x = +- sqrt(-4(1)(1))/2
x = +- sqrt(-4)/2
x = +- 2i/2
x = +- i
x = i or x = -i
Quicker solution:
If you have x^2 = number, then
x = +- sqrt(number)
Once you get to
x^2 + 1 = 0
Subtract 1 from both sides
x^2 = -1
Apply the quick method
x = +- sqrt(-1)
x = +- i
8.
2x^2 + 50 = 0
Divide both sides by 2
x^2 + 25 = 0
Subtract 25 from both sides
x^2 = -25
Apply quick method
x = +- sqrt(25)
x = +- 5i
x = 5i or x = -5i
Answer:
<h3><em>
isosceles</em></h3>
An isosceles triangle is a triangle that has two sides of equal length.
An acute triangle is a triangle with three acute angles (less than 90°).
A scalene triangle has all its sides of different lengths. Equivalently, it has all angles of different measure.
An equilateral triangle is a triangle in which all three sides are equal.
