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Free_Kalibri [48]

3 years ago

11

A rectangular lawn has area 140 square yards. Its length is six less than twice the width. What are the width and length of the

lawn?

1 answer:

Gwar [14]3 years ago

4 0

Answer:

width = let width be w

area = 140

length = 2w-6

Area of a rectangle = l*b

⇒ 2w-6*w=140

⇒ $2w^2-6=140\\2w^2 = 146\\w^2 = 146/2\\w^2 = 73\\w = \sqrt{73}$

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The coefficient of the ab term is

Jlenok [28]

Answer:

A coefficient is an integer that is written along with a variable or it is multiplied by the variable. For example, in the term 2x, 2 is the co-efficient.

Those variables which do not carry any number along with them, have a coefficient 1. For example, the term y has coefficient 1.

Step-by-step explanation:

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A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us

amm1812

Answer:

Given:

Sham: n= 20, x=0.44, s=1.24,

Magnet:n= 20, x =0.49, s= 0.95

For Sham:

Sample size, n = 20

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Standard deviation = 1.24

For Magnet:

Sample size = 20

Sample mean = 0.49

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The null and alternative hypotheses:

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H1: s1² ≠ s2²

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Test statistics = 1.7037

b) P-value:

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Magnet: degrees of freedom $= n - 1 = 20 - 1 = 19$

The critical values:

[Za/2, df1, df2)], [(1 - Za/2), df1, df2]

$f[0.05/2, 19, 19], f[(1 - 0.05/2), 19, 19]$

$f[0.025, 19, 19], f[0.975, 19, 19]$

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3 years ago

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SpyIntel [72]

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers