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Sauron [17]
2 years ago
9

2x + 3 = -7 what is x ​

Mathematics
1 answer:
Shtirlitz [24]2 years ago
6 0

Answer: x=-5

Step-by-step explanation:

You would have to do the inverse to “undo” the equation.

So first you would do -7-3=-10

Then you would do -10/2=-5 to find x

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5. If position of object x = 3 sinΘ – 7 cosΘ then motion of object is bounded between position.​
lesya692 [45]

9514 1404 393

Answer:

  ±√58 ≈ ±7.616

Step-by-step explanation:

The linear combination of sine and cosine functions will have an amplitude that is the root of the sum of the squares of the individual amplitudes.

  |x| = √(3² +7²) = √58

The motion is bounded between positions ±√58.

_____

Here's a way to get to the relation used above.

The sine of the sum of angles is given by ...

  sin(θ+c) = sin(θ)cos(c) +cos(θ)sin(c)

If this is multiplied by some amplitude A, then we have ...

  A·sin(θ+c) = A·sin(θ)cos(c) +A·cos(θ)sin(c)

Comparing this to the given expression, we find ...

  A·cos(c) = 3   and   A·sin(c) = -7

We know that sin²+cos² = 1, so the sum of the squares of these values is ...

  (A·cos(c))² +(A·sin(c))² = A²(cos(c)² +sin(c)²) = A²(1) = A²

That is, A² = (3)² +(-7)² = 9+49 = 58. This tells us the position function can be written as ...

  x = A·sin(θ +c) . . . . for some angle c

  x = (√58)sin(θ +c)

This has the bounds ±√58.

3 0
3 years ago
The midpoint of a line segment is the point halfway between its endpoints.<br><br> True or False?
horrorfan [7]
This is true. You can remember by it saying mid, as in middle.
5 0
3 years ago
Read 2 more answers
Rylee is baking cupcakes for a bake sale. She spends $35 on supplies and she plans to sell the cupcakes for $2.50 each. How many
Setler [38]

Answer:

44 cupcakes

Step-by-step explanation:

Since she spent $35, and she wants to profit $75, she needs to make $110.

110/2.5 = 44

6 0
3 years ago
You are replacing the linoleum in a 14.5 by 12.5 kitchen, how many square feet of carpet should you buy
lana [24]

Answer:

The area of the room is 125 square feet because 12.5 times 10=125 square feet. As a result, you will spend $187.5 for it cost $1.5 to buy one square foot of carpet, and now we need 125 square feet to cover the room which 125 times 1.5 to get 187.5. Hope it help!

Step-by-step explanation:

3 0
3 years ago
What unfortunate mistake did the champion ice skater make with his gold medal
Fed [463]

Answer:

He Had It Bronzed

Step-by-step explanation:

Hope this help pls mark as brainlest!!

5 0
3 years ago
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