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3 years ago

Adrianna runs up 4.5 flights of stairs. How far will Arianna have to run down to represent an additive inverse?

Mathematics

1 answer:

Mashutka [201]3 years ago

6 0

Answer:

She needs to run down 4.5 flights of stairs to represent an additive inverse

Step-by-step explanation:

Having an additive inverse means that she will be back at point zero.

The point zero in this context simply refer to her starting point.

So if she has run up 4.5 flights of stairs, then to be back at her starting point, she needs to run down also 4.5 flights of stairs

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Step-by-step explanation:

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3 years ago

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Answer:

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3 years ago

Cos(-170°) = _____<br><br> -cos10°<br> cos10°<br> cos(-10°)

ikadub [295]

<em>The right answer for:</em>

<h2>Explanation:</h2>

The cosine function is an even function, which means that for every point $(x,y)$ on the graph of $y=cos(x)$ then the point $(-x,y)$ also lies on the graph of the function. In other words, we can write:

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But:

$170^{\circ}=180^{\circ}-10^{\circ}$

So:

$cos(170^{\circ})=cos(180^{\circ}-10^{\circ})$

By property:

$cos(a-b)=cosacosb+sinasinb \\ \\ a=180^{\circ} \\ \\ b=10^{\circ} \\ \\ cos(170^{\circ} )=cos(180^{\circ} -10^{\circ})=cos180^{\circ} cos10^{\circ} +sin180^{\circ} sin10^{\circ} \\ \\ cos(170^{\circ})=-cos(10^{\circ})+0 \\ \\ \boxed{cos(170^{\circ})=-cos(10^{\circ})}$

<h2>Learn more:</h2>

Trigonometric functions: brainly.com/question/2680050

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3 years ago

Find a positive angle less than one rotation that is coterminal with –308°.

Anna35 [415]

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3 years ago

Read 2 more answers

Which of the following equations describes the line shown below? check all that apply

Ierofanga [76]

The equation of the line can be written as:

y - 3 = 2( x + 2)
and
y - 9 = 2(x - 1)

So the answers are E and F

Hope this helps :)

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3 years ago