Select all of the problem situations that can be solved using the given equation.

1 answer:

7 0

The correct answers: "a" and "c".

At "a" we have:
x= number of unopened packages

At "c" we have:
x= number of hours that she works

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Answer: is 6 because if you take away 32 and 14 you will get 18 and if you divide 18 into 3 equal piles for three days you will get 6.......graded assignments

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1+cos2A /1-cos2A=cotA.cotA

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Answer:

See Explanation

Step-by-step explanation:

$formulae \: to \: be \: used : \\ \cos 2 \theta = 2 { \cos}^{2} \theta - 1 \\ and \\ \cos 2 \theta = 1 - 2 { \cos}^{2} \theta \\ \\ now \: let \: us \: prove \: the \: given \: trigonometrical \: \\ identity. \\ \\ \frac{1 + \cos2A}{1 - \cos2A} = \cot \: A. \cot \: A \\ LHS = \frac{1 + \cos2A}{1 - \cos2A} \\ \\ = \frac{1 +2 { \cos}^{2} A- 1 }{1 - (1 - 2 { \sin}^{2} A)} \\ \\ = \frac{1 +2 { \cos}^{2} A- 1 }{1 - 1 + 2 { \sin}^{2} A} \\ \\ = \frac{2 { \cos}^{2} A }{2 { \sin}^{2} A} \\ \\ = \frac{{ \cos}^{2} A }{ { \sin}^{2} A} \\ \\ = { \cot}^{2} A \\ \\ = { \cot} A .{ \cot} A \\ \\ = RHS \\ \\ hence \: proved.$

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Evaluate 2p-nm-4, if m=3, p=15, and n=5.

BabaBlast [244]

Step-by-step explanation:

given m = 3, p = 15 and n = 5,

$2p - nm - 4 \\ = 2(15) - (5)(3) - 4 \\ = 30 - 15 - 4 \\ = 15 - 4 \\ = 11$

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