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3 years ago

If the cost of making 20 copies is $1.30, how much will 1 copy cost?

Mathematics

1 answer:

Norma-Jean [14]3 years ago

8 0

Answer:

6,5

Step-by-step explanation:

1 dollar 30 cent = 130 cent

20 copies=130

1 copy=130/20=6,5

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Artyom0805 [142]

Answer:

$2 per pound

Step-by-step explanation:

Let the cost of apples be x

Then we have equation:

(9 - 1.5)x = 15
7.5x = 15
x = 15/7.5
x = 2

Cost of apple: $2 per pound

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2 years ago

A dilation with a scale factor of 1/3 is a reduction.

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That's true.
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3 years ago

At a ski lift, 41 people are waiting to board cars that hold 6 people each. How many cars will be completly filled? How many peo

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Answer:

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2 years ago

You wish to compare the prices of apartments in two neighboring towns. You take a simple random sample of 12 apartments in town

Rom4ik [11]

Answer:

The value of P-value is 0.0472.

Step-by-step explanation:

We are given that you take a simple random sample of 12 apartments in town A and calculate the average price of these apartments. You repeat this for 15 apartments in town B.

Let $\mu_1$ = true average price of apartments in town A

$\mu_2$ = true average price of apartments in town B

So, Null Hypothesis, $H_0$ : $\mu_1=\mu_2$

Alternate Hypothesis, $H_A$ : $\mu_1\neq \mu_2$

The test statistics that have been used here is two-sample t-test statistics, i.e;

The test statistics given to us is 2.1

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P-value = P( $t__n__1+_n_2-_2$ > 2.1)

= P( $t_2_5$ > 2.1) = 0.0236

In two-tailed test, P-value is calculated as = 2 $\times$ 0.0236 = 0.0472

Hence, the value of the p-value is 0.0472.

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3 years ago

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