Answer:
A - 2x + 4 + 50 = 10x - 2
Step-by-step explanation:
1.) It is the only equation that makes mathematical sense
2.) The sum of angles ABD and DBC equal angle ABC, and ABC = 10x -2
Note:
x=7 if it is important later on
Answer:
P'(0, -4)
Step-by-step explanation:
when a coordinate (x, y) is rotated by 180 degrees, the resulting coordinate will be (-x, -y). Note that each coordinate is negated when rotated about 180 degrees
Given the coordinate P (0, 4). When rotated by 180 degrees, the resulting coordinate will be at P'(0, -4)
Answer:
(-3, -5)
Step-by-step explanation:
By using the distance formula, we see that the length of RT is
which equals
.
The ratio of RS to ST is 3:2, so we can write the distance of RS as
which equals
. The distance of ST is then
.
Since we know the distance of RS and ST, we can find the coordinates of point S by using the distance formula again:
and 
We solve for x and y, getting (-3, -5).
Since the formula for the area of a four sided figure is:
A=base*height
Rearrange the equation to solve for height:
h=A/b
63cm squared/7cm=9cm
height=9cm
x=9cm