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svet-max [94.6K]
3 years ago
11

Need help with this question i can not figure it out please help.

Mathematics
1 answer:
dimaraw [331]3 years ago
3 0
It is false. Choose a=12 and b=10 to find,

LHS = (12-10)² = 2² = 4
RHS = 12² - 10² = 144 - 100 = 44

LHS =/= RHS so the statement must be false.
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Select the correct answer.
IceJOKER [234]

Answer: Option D. y+2x=3


Solution

If a line with a slope of -2:

Slope: m=-2

crosses the y-axis at (0,3):

(0,3)=(0,b)→b=3

What is the equation of the line?

y=mx+b

Replacing the known values:

y=-2x+3

Adding 2x both sides of the equation:

y+2x=-2x+3+2x

y+2x=3


4 0
4 years ago
chegg evaluate the following integral using trigonometric substitution. dx/square root(x^2-81), x > 9
vesna_86 [32]

Integration will be ln | ( x /9 ) + ( \sqrt{(x/9)^{2} - 1 } ) | + c  .

Given  ∫ 1 dx / ( x^{2} - 81 )

Put ,

x = 9 secθ

dx = 9 secθ tanθ dθ

and

\sqrt{x^{2}  - 9^{2} } = 9 tanθ

Substituting values in  ∫ 1 dx / ( x^{2} - 81 ) ,

∫ (9 secθ tanθ ) dθ / ( 9 tanθ )

∫ secθ dθ = ln | secθ + tanθ | + c

                = ln | ( x /9 ) + ( \sqrt{x^{2}  - 9^{2} } / 9 ) | + c

              = ln | ( x /9 ) + ( \sqrt{(x/9)^{2} - 1 } ) | + c

Hence , the integration will be ln | ( x /9 ) + ( \sqrt{(x/9)^{2} - 1 } ) | + c .

To learn more on integration follow link :

brainly.com/question/20156869

#SPJ4

6 0
2 years ago
Write a story problem for the addition sentence 7+ __=9.solve the story problem.
vfiekz [6]
The missing blank is 2 because 7+2=9.
3 0
4 years ago
Read 2 more answers
A distribution of values is normal with a mean of 1986.1 and a standard deviation of 27.2.
m_a_m_a [10]

Answer:

I used the function normCdf(lower bound, upper bound, mean, standard deviation) on the graphing calculator to solve this.

  • Lower bound = 1914.8
  • Upper bound = 999999
  • Mean = 1986.1
  • Standard deviation = 27.2

Input in these values and it will result in:

normCdf(1914.8,9999999,1986.1,27.2) = 0.995621

So the probability that the value is greater than 1914.8 is about 99.5621%

<u><em>I'm not sure if this is correct </em></u><em>0_o</em>

4 0
3 years ago
Round 22.5240 to the nearest thousandth
shutvik [7]
22.5240 rounded to the nearest thousandth is 22.524. For this decimal number to be rounded up rather than down, the original number would have had to been 22.525 or higher.
5 0
3 years ago
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