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muminat
3 years ago
9

Use a calculator to find the correlation coefficient of the data set.

Mathematics
1 answer:
ratelena [41]3 years ago
7 0

Answer:

Step-by-step explanation:

Enter the x,y values in the box above. You may enter data in one of the following two formats:

   Each xi,yi couple on separate lines:

   x1,y1

   x2,y2

   x3,y3

   x4,y4

   x5,y5

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A rectangular lawn, 100 feet long by 50 feet wide, is to have two sidewalks installed that will cut the lawn in half both ways,
Damm [24]

Answer:

3.41 feet

Step-by-step explanation:

Area = Length × Breath

Area of the rectangular lawn = 100 × 50

                                                = 5000 feet²

The sidewalk must occupy an area no more than 10% of the total lawn area.

So, the area of the sidewalk would be not more than  = 10% × 5000

                                                                                         = 0.10 × 5000

                                                                                        = 500 feet²

Let the width of the sidewalk = x feet

area of the side walk = (L×W of the long way) + ((L-x)×W of the short way)

(100 × x) + ((50 - x) × x) < 500

100x + (50-x)(x) < 500

-x²  + 150x < 500

-x² + 150x = 500

-x² + 150x - 500 = 0

By using quadratic formula

x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}

x=\frac{(-150)\pm\sqrt{(150)^2-4(-1)(-500)} }{2(-1)}

x=\frac{-150\pm \sqrt{20500} }{-2}

x=75-5\sqrt{205} or x=75+5\sqrt{205}

x = 3.41089 ≈ 3.41 feet  or  x = 146.58

Therefore, width of the sidewalk would be 3.41 feet.

5 0
3 years ago
What does it equal 5/12 + 1\4
baherus [9]
5/12= 2.4
1/4=4
2.4+4=6.4
5 0
3 years ago
Read 2 more answers
Round 0.424 to the nearest tenth
lakkis [162]
0.424 rounded to nearest tenth would be 0.4 as you can not round up because the hundredth place is not 5 or higher
5 0
3 years ago
Read 2 more answers
Help me out pleasee will give brainliest or whatever its called
Brums [2.3K]

Answer:

-8z-1

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Wht is 84 is 74% of what number
Elina [12.6K]
'is' in mathematics means equal
'of' in mathematics means multiplication

percent means over 100

84 = 74% * x

84 = 74/100 * x

84 = 37/50 * x

Multiply 50/37 on both sides, so we can isolate 'x'

85 * 50/37 = x

x = 4250/37

x ≈ 114.864865

84 is 74 percent of <span>114.86</span>.
6 0
3 years ago
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