Answer:
18
Step-by-step explanation:
1/3 n = n - 12 Cross multiply
n = 3(n - 12)
n = 3n -36
2n = 36
n = 36/2
n = 18
Answer:
r(180°,0) is a rotation of 180° degrees over the origin.
Notice that this rotation moves our figure to the opposite quadrant (so a translation of two quadrants).
Then this is equivalent to:
A reflection over the x-axis followed by a reflection over the y-axis.
Or.
A reflection over the y-axis followed by a reflection over the x-axis.
There is another possible reflection, but it depends on where is our figure.
If the figure is in the first or third quadrant, a reflection over the line y = -x is equivalent to the rotation.
If the figure is in the second or third quadrant, then the reflection over the line y = x is equivalent to the rotation.
We can combine those two and write:
A reflection over the line y = (-1)^n*x.
Where n is the number associated with the quadrant where the figure is in.
A rotation reflection, r(180°, O)(△BCD), can be achieved by performing two reflections over intersecting lines.
If the lines intersect at an angle of 90 degrees, the combination of the two reflections would result in a 180-degree rotation.
The mathematical question requires knowledge of geometrical transformations, specifically, reflections.
The rotation reflection, r(180°, O)(△BCD), means the initial triangle within the plane is reflected over a point 'O' by 180 degrees.
This reflection will result in an image equivalent to a series of two reflections over intersecting lines.
In commonly accepted mathematical conventions, it is generally accepted that any rotation can be represented by two reflections over intersecting lines.
For instance, two reflections over lines intersecting at an angle ∅/2 represent a rotation by an angle ∅, hence, a rotation by 180 degrees would mean the intersecting angle is 90 degrees.
#SPJ3
The shorter piece of string is 5 feet long and the longer piece is 14 feet long. These lengths were determined by setting up and solving an equation based on the given facts.
In this problem, we need to find the lengths of two sections of a 19-foot piece of stringthat was split such that the longer piece is 4 feet longer than twice the length of the shorter one. Let's denote the length of the shorter piece as 'x'. Thus, the longer piece of string is 2x+4 (twice the length of the shorter piece, plus an additional 4 feet).
Next, we set up an equation based on the information given: the sum of the lengths of the shorter and the longer sections of string equals 19 feet, so x + (2x+4) = 19. Simplify the equation to 3x + 4 = 19, subtract 4 from both sides to give 3x = 15, and then divide by 3 to solve for x, the length of the shorter piece, which is 5 feet. Therefore, the longer piece, by substituting x=5 in 2x+4, is 14 feet.
#SPJ2
Answer:
1. x=7
2. x=11
3. x=0.2
Step-by-step explanation:
Answer:
Option B is the right answer.
Step-by-step explanation:
Given is - Alexandra is climbing a tree that is 105 feet tall. She has climbed 70 feet so far.
This means Alexandra has covered 70 feet and final point is 105 feet.
f is the remaining distance;
So,
So, option B is the right answer.