Any polygon given by a list of 2D vertex coordinates has area given by the shoelace formula.
That's the absolute value of half the sum of the cross products of the sides. We form the table of the vertices. We include the first vertex at the end, then calculate the cross product of the side, (a,b) then (c,d) gives cross product ad-bc.
cross product
-4 3 0
0 0 0
6 8 6(11)-8(2) = 66 - 16 = 50
2 11 2(3) - (11)(-4) = 50
-4 3
So the area is (1/2)(50+50) = 50
Answer: 50
Answer:
x=320+t-s
Step-by-step explanation:
Answer:
In 2 hours: 1050 miles
In 3 hours: 1575 miles
In 4 hours: 2100 miles
Step-by-step explanation:
Multiply 525 by the number of hours to get each answer.
6 divided by 10 would be 60 percent and .60 as a decimal
4(b-1)=2b+10 carry out indicated multiplication on the left side
4b-4=2b+10 subtract 2b from both sides
2b-4=10 add 4 to both sides
2b=14 divide both sides by 2
b=7
