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dem82 [27]
4 years ago
15

Which of the following equations have exactly one solution?

Mathematics
1 answer:
Tems11 [23]4 years ago
8 0

Answer:

A, B, & C

Step-by-step explanation:

A: -5x +12 = -12x - 12

    +12x        +12x

    7x + 12 = -12

         -12     -12

            7x = -24                 [Divide both sides by 7 to get x]

              x = -24/7

B: −5x + 12 = 5x + 12

   -5x            -5x

    -10x + 12 = 12

            -12     -12

            -10x = 0                   [Divide both sides by -10 to get x]

                 x = 0

C: −5x + 12 = 5x − 5

    -5x           -5x

    -10x + 12 = -5

            -12      -12

           -10x = -17                  [Divide both sides by -10 to get x]

               x = 17 / 10

D: −5x + 12 = −5x − 12

    +5x           +5x

              12 ≠ -12         [The statement is false, so it isn't the correct answer]

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Answer:

4√2

Step-by-step explanation:

If a square has a perimeter of 16,  then its side lengths are 4.

Use the pythagorean theorem to find the diagonal.

  • 4^2+4^2=c^2
  • 16+16=c^2
  • 32=c^2
  • c=√32

√32 can be simplified to 4√2.

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3 years ago
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5. Point H is located at (-7, 5). Where is H' after a 270° clockwise rotation?​
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I hope this helps you sorry to get it wrong

Answer:

H after a 270 degrees clockwise rotation is at  (-5,-7)

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3 years ago
Find the perimeter and area of this figure
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Answer:

A = (16π -32) in²

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Step-by-step explanation:

The area is that of a quarter-circle of radius 8 inches less half the area of a square with side length 8 inches. Two formulas are useful:

area of a circle = πr² . . . . .r = radius

area of a square = s² . . . . s = side length

Then your area is ...

A = (1/4)π(8 in)² - (1/2)(8 in)² = (64 in²)(π/4 -1/2)

A = (16π -32) in²

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The applicable formulas for the side lengths of your figure are ...

arc BD = (1/4)(2πr) = π(r/2) = π(8 in)/2 = 4π in

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The perimeter is the sum of these lengths, so is ...

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Of course, you are very familiar with the fact that an isosceles right triangle with side lengths 1 has a hypotenuse of length √(1²+1²) = √2. Scaling the triangle by a factor of 8 inches means the segment AB will be 8√2 inches long.

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3 years ago
In 1970 there were 160 African American women in elected public office in the United States. By 1993 the number had increased to
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Answer:

Average rate of change for the number of African American women who held office at any given time between 1970 & 1993 is   94.43.

Step-by-step explanation:

Here, according to the question:

Number of African American women in elected public office in the United States in the year 1970 = 160

Number of African American women in elected public office in the United States in the year 1993 = 2332

Now, the change in the number of elected women between 1970 & 1993

= Women elected in the year 1993 - Women elected in the year 1970

=  2332 -  160  = 2,172

or, the change in the number of elected women candidates between 1970 & 1993 is 2,172

Now, the difference in the time period is 1993 - 1970 =  23 years

So, \textrm{The average rate of change}  = \frac{\textrm{Total change in the quantity}}{\textrm{Time Interval}} \\=\frac{2172}{23}  = 94.43

Hence, the average rate of change for the number of African American women who held office at any given time between 1970 & 1993 is 94.43.

6 0
4 years ago
The conditional relative frequency table below was generated by column using frequency table data comparing the number of calori
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Answer:

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The conditions that satisfy whether there exists an association between conditional relative frequencies are:

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2. When the conditional relative frequencies are nearly equal for all categories, there may be no association between the variables.

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We can conclude that there is an association because the value 0.15 is not similar to the value 0.55

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