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3 years ago

Can you guys help me with this? I really need help.

Mathematics

1 answer:

dmitriy555 [2]3 years ago

5 0

Answer:

Uhh haahah Hindi ko alam yan

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What is 5x + 7 < 22 on a number line

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x < 3

Step-by-step explanation:

$5x + 7 < 22 \\ 5x < 22 - 7 \\ 5x < 15 \\ x < \frac{15}{5} \\ x < 3$

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3 years ago

The quarterback for the Dallas Cowboys throws a pass and gains 11 yards on the first down but then

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3 years ago

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Jimmy took out a loan for $5,600 to pay for a home repair the bank offered an interest rate of 4.75 % how much interest would sh

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Step-by-step explanation:

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2 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:

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

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

#LearnWithBrainly

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3 years ago