3 years ago

In a random sample of citizens in one town, 21 out of 200 people were left handed. Which of these is the best inference to

Mathematics

1 answer:

Ronch [10]3 years ago

6 0

Answer:

A about ten percent of the town is left handed

Step-by-step explanation:

20 of 200 is ten percent and this town could be an outlier in left handed populations.

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The square root of -100 = ___ + ___i

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Alenkinab [10]

X - the percent of increase

$210+210x=260 \\
210x=260-210 \\
210x=50 \\
x=\frac{50}{210} \\
x \approx 0.238 \\
x \approx 23.8\%$

The percent of increase is approximately 23.8%.

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3 years ago

8 times of the eight term of an arithmetic progression is equal to 12 times of the twelfth term. find its first term if the comm

Ilya [14]

Answer:

a₁ = 38

Step-by-step explanation:

Given AP, where:

8a₈ = 12a₁₂
d = -2,
a₁ = ?

=============

<h3>Solution</h3>

aₙ = a₁ + (n-1)d

a₈ = a₁ + 7d = a₁ + 7*(-2) = a₁ - 14
a₁₂ = a₁ + 11d = a₁ + 11*(-2) = a₁ - 22

8a₈ = 12a₁₂

8(a₁ - 14) = 12(a₁ - 22)
2(a₁ - 14) = 3(a₁ - 22)
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3a₁ - 2a₁ = -28 + 66
a₁ = 38

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3 years ago