What is the answer to this? -6+13=
1 answer:
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P(7,6), Q(1,6), R(4,2)
We have PQ parallel to the x axis. We'll call that the base,
b = 7 - 1 = 6
The altitude is then the y difference h = 6 - 2 = 4
The area is
Answer: 12 square units
In general we can use the shoelace formula for the area of any polygon given coordinates. We write the points like this:
(7,6), (1,6), (4,2)
(1,6), (4,2), (7,6)
The area is then half the absolute value of the sum of the cross products:
Answer:
49 r. 3
the answer is 49 but since three can go into 148 evenly the remainder is 3
Or, if you're familiar with the empirical rule and the basic properties of the normal distribution, you can use the fact that approximately
which means about
Because the distribution is symmetric, you have