3 years ago

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Mathematics

1 answer:

attashe74 [19]3 years ago

3 0

Answer:

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Step-by-step explanation:

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You have 40 grams of a radioactive kind of tellurium. If it's half life is 9 hours, how much will be left after 18 hours

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Answer:

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Angles A and B are complementary angles in a right triange. The value of cos(A) is 12/13. What is the value of Tan(A)

Orlov [11]

Using the pythagorean identity, we can find the value of sin(A)

cos^2(A) + sin^2(A) = 1
(12/13)^2 + sin^2(A) = 1
144/169 + sin^2(A) = 1
sin^2(A) = 1 - 144/169
sin^2(A) = 169/169 - 144/169
sin^2(A) = (169 - 144)/169
sin^2(A) = 25/169
sin(A) = sqrt(25/169)
sin(A) = 5/13

Which is then used to find tan(A)

tan(A) = sin(A)/cos(A)
tan(A) = (5/13) divided by (12/13)
tan(A) = (5/13)*(13/12)
tan(A) = (5*13)/(13*12)
tan(A) = 5/12

The final answer is 5/12

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A movie theater charges $10 for adult tickets and $7 for child tickets. On a particular day, they made $1446 in ticket sales. Th

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X = adults
Y = child

X+y=168
X=168-y

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