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patriot [66]
4 years ago
5

Number 6, part B. i don't understand

Mathematics
1 answer:
Zepler [3.9K]4 years ago
6 0
X^2+2x= -8

x^2+2x+1= -8+1
(x+1)^2= -8+1
(x+1)^2=-7

x+1= √-7

The answer is No Solution because the root of a negative number is not a real number.
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Please help with 17 and 18
zzz [600]
17. Domain: x=/ -2, Range: y=/-4
18. Domain: x>=-5, range: y>=-5

Lmk if youd like an explanation
3 0
3 years ago
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
PLEASE HELP!!! I tried using different formulas, adding, subtracting, dividing, multiplying you name it and I have yet to find t
zvonat [6]

Answer:

19.14

Step-by-step explanation:

You have a half circle and a square, look at them separate then add for the area.

Circle

Your radius is half the diameter, so 4/2

Radius  = 2

A = 3.14 * radius\\A = 3.14 * 2\\A = 6.28

This is for the entire circle, half of that would be 3.14

Square

A = 4^{2} \\A = 16

Add them both together for a total area of 19.14 square miles

6 0
3 years ago
Solve the inequality.c – 12 &gt; –1
mario62 [17]
C=11. 11 -12 = -1. You can't subtract a integer so you have.to add it's opposite so 11 + (-12) = -1. Hope it helps.
7 0
3 years ago
Which of the following illustrates the truth value of the given conditional statement? p: 2 + 2 = 4 q: 7 + 1 = 7 T F → F T T → T
musickatia [10]

Answer:

T F → F is the correct answer.

Step-by-step explanation:

In the given question if p illustrates p: 2 + 2 = 4

which is true so the truth value of this statement p is True.

Now the other statement q illustrates q: 7 + 1 = 7

Which is a false statement so the truth value of this statement is False.

As we know when "p→q ( p implication q), the truth value of implication is False only when truth value of p is True and for statement q the truth value is False."

We can see from the truth table truth value of p→q will be False.

So T F → F

4 0
4 years ago
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