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OverLord2011 [107]
3 years ago
9

Complete the square to solve the equation below x^2-10x-1=13

Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
7 0

Answer:

x=5+39 squared, 5-39 squared

Step-by-step explanation:

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The width of a rectangle is 3/4 its length. The perimeter of the rectangle is 240 ft. What is the length, in feet, of the rectan
zalisa [80]

Answer: 51.4275 or 51.428571 (repeating decimals) feet

Step-by-step explanation:

P = perimeter

L = length

W = width

Represent W as  \frac{3}{4} L

Find L

P = 2L + 2W

240 = 2L + 2(\frac{3}{4}L)

240 = 2L + \frac{3}{2} L  or you can write 3/2 as 1.5

240 = 2L + 1.5L

240 = 3.5L

\frac{240}{3.5} L = \frac{3.5L}{3.5}

L =  ≈ 68.57 or 68.571428 (but this is <em>repeating decimals</em> so I rounded it)

Find W

\frac{3}{4} L

\frac{3}{4}  * 68.57 = 51.4275

Or if you want unrounded version 51.428571 (repeating decimals)

4 0
2 years ago
Which statement best describes the data in a scatter plot where the Y values are decreasing as the x-values are increasing
Sphinxa [80]

Answer:

<h2>Option D is the right answer.</h2>

Step-by-step explanation:

We need to find the option for which the value of the function will be increasing, with the increasing variable.

Vertical line means the value of the x is constant, for any y. Hence, it is not the answer.

Horizontal line represents constant functions. Hence option B can not be the answer.

The data having a positive slope represents a <u>increasing function with the increasing variable</u>. Vice-versa for the data having a negative slope.

That is why option D will be the answer.

6 0
3 years ago
Walter needs new grass in the circular pen for his chickens. The pen has 308 feet of fencing. What is the area of the pen?
ICE Princess25 [194]

Answer: 7546feet²

Step-by-step explanation:

Since the pen has 308 feet of fencing, this is the perimeter of the circular pen and we can get the raduus which goes thus:

Circumference of a circle = 2πr

2πr = 308

2 × 22/7 × r = 308

44/7 × r = 308

r = 308 × 7/44

r = 49

Therefore, area of the circular pen will be:

= πr²

= 22/7 × 49 × 49

= 7546feet²

3 0
2 years ago
How many different groups of three kids can you make from seven kids?<br> 35<br> 210<br> 6<br> 24
Neko [114]
The answer is 35 different groups.
6 0
3 years ago
If 5-y^2=x^2 then find d^2y/dx^2 at the point (2, 1) in simplest form. ​
ratelena [41]

Answer:

y"(2, 1) = -5

Step-by-step explanation:

Step 1: Define implicit differentiation

5 - y² = x²

Step 2: Find dy/dx

  1. Take implicit differentiation: -2yy' = 2x
  2. Isolate y': y' = 2x/-2y
  3. Isolate y': y' = -x/y

Step 3: Find d²y/dx²

  1. Quotient Rule: y'' = [y(-1) - y'(-x)] / y²
  2. Substitute y': y" = [-y - (-x/y)(-x)] / y²
  3. Simplify: y" = [-y - x²/y] / y²
  4. Multiply top/bottom by y: y" = (-y² - x²) / y³
  5. Factor negative: y" = -(y² + x²) / y³

Step 4: Substitute and Evaluate

y"(2, 1) = -(1² + 2²) / 1³

y"(2, 1) = -(1 + 4) / 1

y"(2, 1) = -5/1

y"(2, 1) = -5

3 0
3 years ago
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