3 years ago

Question 1 . What division problem does this area model represent?

Mathematics

1 answer:

Law Incorporation [45]3 years ago

6 0

Answer:

Step-by-step explanation:

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3 yards of cotton . 3/4 for each skirt. How many skirts

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Answer:

Step-by-step explanation:

3/3= 1 => 1 * 4 +4

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3 years ago

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Find the slope of the line (-4, -1) (1, 4)

timofeeve [1]

(y - yo) = m.(x - xo)

We have two points (-4, -1) and (1, 4)

(-1 - 4) = m.(-4 - 1)

(-5) = m.(-5)

m = (-5)/(-5)

m = 1

So the slope is 1

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What is the area of an equilateral triangle with apothem 3

Orlov [11]

Answer:

use formula of equilateral triangle = roots 3/4 a square.

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3 years ago

Riya got 10 correct answers and ten incorrect answers. what is her score if each correct answer is awarded with 3 marks and each

Natasha2012 [34]

Answer:

Step-by-step explanation:

Riyas score = ( correct answer × mark) + ( incorrect answer × mark lost )

= ( 3× 10) + ( -1 ×10 )

= 30 -10

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3 years ago

A student wants to estimate the mean score of all college students for a particular exam. First use the range rule of thumb to m

Wewaii [24]

Answer:

See explanation below

<u>Step-by-step explanation:</u>

range = 2200 - 300 = 1900

To find standard deviation, we have:

standard deviation = range/4 = $\frac{1900}{4}$ = 475

The range rule of thumb estimate for the standard deviation is 475

Given:

Standard deviation, $\sigma$ = 475

Margin of Error, ME = 100

$\alpha$ = 1 - 0.90 = 0.10

Za/2 = Z0.05 = 1.64

Find sample size, n:

n ≥ $[Z_\alpha_/_2 * (\frac{\sigma}{ME})]^2$

n ≥ $[1.64 * (\frac{475}{100})]^2$

n ≥ 60.68

≈ 61

Minimun sample size,n = 61

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3 years ago