The third term, fourth term and tenth term are -1, -3, -15 respectively.
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What is a sequence?</h3>
A sequence is a pattern of numbers in which successive terms differ by an constant term called the common difference or ratio.
Analysis:
For a sequence defined by the rule A(n) = 3 + (n-1)(-2)
Third term, n = 3
A(3) = 3 + (3-1)(-2) = -1
Fourth term, n = 4
A(4) = 3 + (4-1)(-2) = -3
Tenth term, n = 10
A(10) = 3 + (10-1)(-2) = -15
In conclusion, the third, fourth, tenth terms are -1, -3 and -15 respectively.
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195% = 1.95 in decimal form.
Details:
Percent means 'per 100'. So, 195% means 195 per 100 or simply 195/100.
If you divide 195 by 100, you'll get 1.95 (a decimal number). Read more below on this webpage.
As you can see, to convert from percent to decimal just divide the percent value (195) by 100, and remove the "%" sign.
Given triangles are similar, so we setup a proportion
(140-x)/81 = x/9
solving gives x = 14
AC = 140-x = 140-14 = 126