3 years ago

Which linear inequality is represented by the graph?

Mathematics

1 answer:

vichka [17]3 years ago

3 0

Where is the Graph? Need the Graph to answer the question.

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Solve 30 = −5(6n + 6), justifying each step with an algebraic property.

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2) inverse property of addition: 60 = -30n
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step 2: subtract 30 from both sides
step 3: divide -30 from both sides

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What is the length of the side opposite Angle B? 3 units 4 units 5 units 6 units

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Answer:

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Step-by-step explanation:

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Find the exact value of the given expression.<br> sin(2cos^-1(5/13))

xeze [42]

Answer:

+120/169 or -120/169

Step-by-step explanation:

let $cos^{-1}[\frac{5}{13} ] = \alpha$

where, alpha is some angle that satisfies the assumed condition.

so, $cos\alpha= 5/13$

[ taking cos to the other side or applying cos on both sides]

now, substitute this in the given expression

$sin(2cos^-1(5/13)) = sin(2\alpha )$

as sin $\beta$ = $+ or -\sqrt{1-(cos\beta) ^{2}$

[by general trigonometry formula: $cos^{2}[\beta] +sin^{2}[\beta]=1$ ]

so if $cos\alpha= 5/13$ , we can get sin $\alpha$ from the above formula as + or - 12/13

(because, after taking square root on both sides we keep + or -]

as, sin $2\beta = 2*sin[\beta ]*cos[\beta ]$

[by general trigonometry formula]

here, now $sin[2\alpha ]=2*(+or- 12/13)*5/13\\$

so, the final value can be 120/169 or -120/169.

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