Answer:
- Equal midpoints of AC and BC.
- The product of the slopes of the diagonals AC and DB is -1.
Step-by-step explanation:
1. Plot the given points, as you can see in the graph attached.
2. Calculate the midpoint of AC and DB:
Therefore, the midpoint of AC and DB are equal.
3. Calculte the slope of the diagonals AC and DB:
4. Multiply the slopes of the diagonals:
(AC and DB are perpendicular)
The fraction 49/21 is equivalent to 2 1/3.
All you have to do is simplify this and you get this answer
Area of road =70*50=3500
3500*2=7000 because it has cross road
6*6=36
7000-36=6964
6964*5.50=38302
P+4=5p+3p-10
Rewrite
5p+3p-10=p+4
Add 5 to 3
8p-10=p+4
Add 10 both sides
8p=p+4+10
Add 4 and 10
8p=p+14
Subtract 1p on both sides
8p-p=14
8 subtract 7
7p=14
Divide 7 both sides
P=14/7
Solve
P= 2
To check substitute in original equation
2+4=5(2)+3(2)-10
6=10+6-10
6=6
It checks
The answer is 42 because 42 times 1 equals 42, 2 times 21 equals 42 and 3 times 14 equals 42.