Answer:
step 1. DBE ~ ABC
step 2. (x + 5)/4 = (2x + x + 5)/(4 + 3)
step 3. ( x + 5)/4 = (3x + 5)/7
step 4. 7x + 35 = 12x + 20
step 5. 5x = 15
step 6. x = 3.
Answer:

Step-by-step explanation:
We have the equation
.
The ordered pairs of this equation have the form 
Where x is the independent variable and y is the dependent variabe.
That is, the points belonging to the line
have the form 
For
.
So, we need to find
for x_0 = -3.
Then we substitute x = -3 into the equation and clear the value of y.

.
Then the ordered pair is:

Answer:15
Step-by-step explanation:
5•5.5
Answer:
C = 80
Step-by-step explanation:
A cyclic quadrilateral is one where all 4 vertices touch the circumference of a circle.
It has 1 interesting property that should concern you: <B + <D = 180 degrees.
3x - 59 + 2x - 1 = 180 Combine like terms
5x - 60 = 180 Add 60 to both sides.
5x = 180 + 60
5x = 240
x = 240/5
x = 48
Now go to 2x + 4.
x = 48
A = 2*48 + 4
A = 96 + 4
A = 100
So C = 180 - 100
C = 80