What is the explicit formula for the arithmetic sequence 4/5, 29/30, 17/15, 13/10?
2 answers:
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The situation forms the right triangle above:
Where x is the length of the ladder.
Apply the Pythagorean theorem:
c^2 = a^2 +b^1
where:
c = hypotenuse = longest side = x
A &b = the other 2 legs of the triangle
Replacing:
x^2 = 60^2 + 15^2
Solve for x
x^2 = 3,600 + 225
x^2 = 3,825
x =√3,825
x = 61.85 ft
This requires that c ≠ 0 , meaning c≠0
Multiply by x to eliminate var in denominator
Common denominator is 8
The answer is: b. -16