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Effectus [21]
2 years ago
5

9 times x is 81 So what is x

Mathematics
2 answers:
murzikaleks [220]2 years ago
7 0

Answer:9

Step-by-step explanation:

9times9 is 81

Ratling [72]2 years ago
6 0

Answer:

x=9

9 x 9 = 81 So x = 9

♡♡♡♡♡♡♡♡♡

Step-by-step explanation:

Hope This Helps! :)

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Cos(-170°) = _____<br><br> -cos10°<br> cos10°<br> cos(-10°)
ikadub [295]

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

<em>cos(-170°) = _____</em>

<em>is:</em>

<em>-cos10°</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

4 0
3 years ago
NEED HELP ASAP
Stels [109]
<span>9,    12,    19,    30,    ...

</span>formula for the nth term is;

<span>2n^2 + 3n - 10</span>
6 0
3 years ago
Solve for x 8 is to 64 as 2 is to X
KIM [24]
8 is to 64 as 2 is to 16

x=16
5 0
3 years ago
Read 2 more answers
Please help I will give brainliest.
Kruka [31]

Answer:

A

Step-by-step explanation:

Construct a perpendicular bisector of segment AB.

Perpendicular bisector is a line that divides the line into two equal halves forming 90° at the intersection point.

So, points A and B will be at the same distance from the intersection point.

If the constructed line (perpendicular bisector) is the reflection axis, then point B will be the refection point of A.

8 0
1 year ago
You plan to paint the outside of this barn, including the roof, but not the floor. Which calculation will help you best decide h
Dvinal [7]
Well you’d need to know how big the barn is and times it all together
5 0
3 years ago
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