Answer:
Step-by-step explanation:
You need to set up a proportion.
(21 - 15) / 21 = 4/(x + 4)
6 / 21 = 4/(x + 4)
2/7 = 4/(x + 4)
2(x + 4) = 7*4
2x + 8 = 28
2x + 8-8= 28 - 8
2x = 20
x = 20/2
x = 10
29.95+8.49=38.44. 2x20=40
40.00
- 38.44. ————————-
————
1.56. ======$1.56
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I believe the answer is sometimes. The most well known Pythagorean triple is 3,4,5.
3^2+4^2=5^2
9+16=25
25=25
However this is not always the case, for example,
8,15,17
is also a Pythagorean triple, but has no positive, consecutive, integers.
