What is the common difference in the sequence 50 40 30 20 10
2 answers:
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Answer:
x ≈ 2.76
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan78° = =
=
( multiply both sides by x )
x × tan78° = 13 ( divide both sides by tan78° )
x = ≈ 2.76 ( to 2 dec. places )