When given 3 triangle sides, to determine if the triangle is acute, right or obtuse:
1) Square all 3 sides.
2) Sum the squares of the 2 shortest sides.
3) Compare this sum to the square of the 3rd side.
28^2 = 784
4^2 = 16
31^2 = 961
784 + 16 = 800
800 < 961
if sum > 3rd side² Acute Triangle
if sum = 3rd side² Right Triangle
if sum < 3rd side² Obtuse Triangle
Therefore, it is an obtuse triangle.
Source:http://www.1728.org/triantest.htm
ANSWER:
2.416x10^5
Or
241600
Both are correct the second is just in expanded form
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Answer: The first day the author reaches 100 days is on day 16.
To solve this problem, you could use a graphing calculator to graph the given equation. Then, determine when this line crosses 100. It crosses when x = 15.539. Therefore, we would have to round up to 16 so it is at least 100.
You could use the quadratic equation to solve: 100 = x^2 -12x + 45
Either you will get 16. If you use the quadratic formula, make sure to only use the positive answer.
Answer:
a1 is 2.
Step-by-step explanation:
a1 is the first value is an arithmetic or geometric sequence.
check the picture below, you can pretty much count the units off the grid.
recall that A = (1/2)bh.