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kaheart [24]
3 years ago
6

Solve this equation -2(x+5)=-3

Mathematics
2 answers:
fenix001 [56]3 years ago
7 0
-2x-10=-3 which equals -2x=7 then divide by -2 and get x=-3.5
RoseWind [281]3 years ago
4 0
First we multiply the left side by the -2 to get rid of the brackets:

-2x + -10 = -3

Next we add 10 to both sides to get x and its multiplier by itself.

-2x = 7

Now we divide both sides by two to get rid of the multiplier on x:

x = 3.5
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Please help me! I will give brainliest to the person who answers correctly.
Sveta_85 [38]

Answer:

  • sin(X) = 6/7.5
  • XY = 4.5
  • cos(X) = 4.5/7.5
  • tan(X) = 6/4.5

Step-by-step explanation:

It is convenient to use the Pythagorean theorem to find XY to start with. That theorem tells you ...

  XZ² = YZ² + XY²

Solving for XY, you find ...

  XY² = XZ² - YZ²

  XY = √(XZ² - YZ²) = √(7.5² -6²) = √(56.25 -36) = √20.25

  XY = 4.5

The mnemonic SOH CAH TOA is very helpful here. It reminds you that ...

  Sin = Opposite/Hypotenuse

  sin(X) = 6/7.5

  Cos = Adjacent/Hypotenuse

  cos(X) = 4.5/7.5

  Tan = Opposite/Adjacent

  tan(X) = 6/4.5

_____

<em>Comment on the triangle and ratios</em>

The side lengths of this triangle are in the ratios ...

  XY : YZ : XZ = 3 : 4 : 5

If you recognize that the given sides are in the ratio 4 : 5, this tells you that you have a "3-4-5" right triangle with a scale factor of 1.5. At least, you can find XY = 1.5·3 = 4.5 with no further trouble.

The trig ratios could be reduced to sin(X) = 4/5; cos(X) = 3/5; tan(X) = 4/3, but the wording "don't simplify" suggests you want the numbers shown on the diagram, not their reduced ratios.

3 0
4 years ago
-2 = -5t + 10t + 2t<br><br> t = ? <br> Help!
romanna [79]

Hello there!

-2 = -5t + 10t + 2t\\

Explanation:

↓↓↓↓↓↓↓↓↓

First you had to switch sides.

-5t+10t+2t=-2

Then you add similar elements.

7t=-2

Divide by 7 from both sides of the equation.

\frac{7t}{7}=\frac{-2}{7}

Simplify it should be the correct answer.

t=-\frac{2}{7}

Answer⇒⇒⇒⇒⇒t=-2/7

Hope this helps!

Thank you for posting your question at here on Brainly.

Have a great day!

-Charlie

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4 years ago
Sine: the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypo
Evgesh-ka [11]
Hello Abbigailallred, <span>Sine: the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse. What is the Sine of angle A, 4/5.

</span>
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