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Burka [1]
3 years ago
12

HELP MEE! PUT THE PERCENT, DECIMAL, AND FRACTION!

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
5 0

Answer:

80c to $1.20: up 50% or x 1.5

$1.20 to 80c: down 33 1/3 % or x 0.6 bar over the 6

80c to $1.60: up 100% or x 2

$1.60 to 80c: down 50% or x 0.5

$1.60 to $1.28: down 20% or x 0.8

$1.28 to $1.60: up 25% or x 1.25

$1.28 to $1.20: down 6 1/4 % or x 0.9375

$1.20 to $1.28: up 6 2/3 % or x 1.06 bar over the 6

VMariaS [17]3 years ago
3 0

80 c, 80%, 80/100, .80

$1.20, 120%, 120/100, 1.2

$1.60, 160%, 160/100, 1.6

$1.28, 128%, 128/100, 1.28

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Similarly, terminal side of angle 'b' lies in quadrant 2, sine of angle 'b' will be  negative.

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By substituting these values in the identity,

cos(a + b) = (-\frac{1}{3})(-\frac{1}{4})-(-\frac{2\sqrt{2}}{3})(-\frac{\sqrt{15}}{4})

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                = \frac{1}{12}(1-\sqrt{120})

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Therefore, cos(a + b) = \frac{1}{12}(1-2\sqrt{30})

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