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Serggg [28]
4 years ago
6

Plz help :( what is n – 10 + 2n + 5

Mathematics
1 answer:
SIZIF [17.4K]4 years ago
5 0

Answer:

n-10+2n-5

to me it look like it equal 3n-5

Step-by-step explanation

step one:

add n+2n which equal to 3n

step 2:

-10+5

you add 5 do -10 which equal to -5

and when u put them together the answer will be

3n-5

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a music store sold 10 to the 3rd power CDs and 10 to the second power CD players if each CD cost $12 and each CD player cost $35
Lynna [10]

Hello keirabug, I am here to answer your question:

Since 10^3 is the same as 10*10*10, or 1000, and each CD is worth 12$, then 1000 * 12$ is equal to 12000$

But for the CD players, it's 10^2 or 10*10, which gives us 100, and each CD player is worth 35$, so 100 * 35$ is equal to 3500$

And then we do an addition to add the prices like this: 12000$ + 3500$ = 15500$

So the answer is 15500$

Hope this helped you!

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4 years ago
One-quarter of a pound of bananas costs $0.82. How much does one pound of bananas cost?
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Answer:

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4 years ago
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Aiko stands 5 m from a tree. At that distance, the angle of elevation from the ground to the top of the tree is 80°.
denis23 [38]

Answer:

\boxed {\boxed {\sf About \ 28.36 \ meters }}

Step-by-step explanation:

Assuming the tree is perpendicular to the ground, we can use the right triangle trigonometric ratios to find the tree's height.

  • sin(θ)= opposite/hypotenuse
  • cos(θ)= adjacent/hypotenuse
  • tan(θ)= opposite/adjacent

Now, let's draw a diagram. We know Aiko is 5 meters from the base of the tree. From there, the angle to the top of the tree is 80 degrees. We are looking for x, the tree's height. The diagram attached is not to scale.

We base the sides off of the angle. x is opposite of 80 degrees and 5 is adjacent. Therefore we must use tangent.

tan(\Theta)=\frac{opposite}{adjacent}

  • opposite=x
  • adjacent=5 m
  • θ=80

Substitute in the known variables.

tan(80)=\frac{x}{5 \ m }

We want to find x, the height of the tree. Therefore we need to isolate that variable.

x is being divided and the inverse operation is multiplication. Multiply both sides of the equation by 5 meters.

5 \ m* tan(80)=\frac{x}{5 \ m }* 5 \ m

5 \ m* tan(80)=x

5 \ m *5.67128182=x

28.3564091 \ m = x

The question asks for an approximation, so let's round to the nearest hundredth.

The 6 in the thousandth place tells us to round the 5 to a 6.

28.36 \ m \approx x

The tree is about <u>28.36 meters tall.</u>

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3 years ago
What is the height of a triangle if the area is 60 square meters​
slava [35]

Answer:

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Step-by-step explanation:

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