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2 years ago

Select all ratios equivalent to 3:4.

Mathematics

2 answers:

andreyandreev [35.5K]2 years ago

7 0

Answer:

18:24

15:20

Step-by-step explanation:

Because 18/3:24/3 = 3:4

Also, 15/5:20/5 = 3:4

riadik2000 [5.3K]2 years ago

4 0

18:24
18:24
15:20
15:20

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Beach Bicycles sells two-seater bicycles. Its markup rate is 68%. Which equation represents the new price for a bicycle, y, give

lesantik [10]

Answer:

y = 1.68x

Step-by-step explanation:

The markup rate of a product or service refers to how higher the selling price is than the total production cost. In this case, this company doesn't produce the bikes, instead it purchases them from a wholesaler, distributor or even the factory, and then resells them in order to make a profit.

E.g. Beach Bicycles purchases two-seater bikes at $200 each, and then it will resell them to their customers at 1.68 x $200 = $336. The total markup in this example is $136, which represents $136/$200 = 68% of the purchase price.

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2 years ago

Write an algebraic expression to

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Answer:

x(1+.05)

or 1.05x

Step-by-step explanation:

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2 years ago

Which of the following best describes the common ratio in the sequence 6310, 1577.5, 394.375, 98.59375, ...?

algol [13]

To find the common ratio, divide the 2nd term by the first term..
1577.5 / 6310 = 0.25 which is the same as 1/4

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2 years ago

Find the perimeter of a square with each side measuring 2 inches.

ivolga24 [154]

A square as four sides.
All the sides of a square are the same length
so this square has 4 sides that are each 2 inches long.
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2 + 2 + 2 + 2 = 8

So this means that...
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3 years ago

A survey asked, "How many tattoos do you currently have on your body?" Of the males surveyed, responded that they had at leas

Musya8 [376]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The 95% interval for $p_1 - p_2$ is $-0.0171 ,0.0411$

Option A is correct

Step-by-step explanation:

From the question we are told that

The sample size of male is $n_1 = 1211$

The number of males that said they have at least one tattoo is $r = 182$

The sample size of female is $n_2 = 1041$

The number of females that said they have at least one tattoo is $k = 144$

Generally the sample proportion of male is

$\r p_1 = \frac{r}{ n_1}$

substituting values

$\r p_1 = \frac{ 182}{1211}$

$\r p_1 = 0.1503$

Generally the sample proportion of female is

$\r p_2 = \frac{k}{ n_2}$

substituting values

$\r p_2 = \frac{ 144}{1041}$

$\r p_2 = 0.1383$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha =100-95$

$\alpha =5\%$

$\alpha =0.05$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table , the value is

$Z_\frac{\alpha }{2} = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \sqrt{\frac{\r p_1 (1- \r p_1)}{n_1} + \frac{\r p_2 (1- \r p_2)}{n_2} }$

substituting values

$E = 1.96 * \sqrt{\frac{ 0.1503 (1- 0.1503)}{1211} + \frac{0.1383 (1- 0.1383)}{1041} }$

$E = 0.0291$

The 95% confidence interval is mathematically represented as

$(\r p_1 - \r p_2 ) - E < p_1-p_2 < (\r p_1 - \r p_2 ) + E$

substituting values

$(0.1503- 0.1383 ) - 0.0291 < p_1-p_2 < (0.1503- 0.1383 ) + 0.0291$

$-0.0171 < p_1-p_2 < 0.0411$

So the interpretation is that there is 95% confidence that the difference of the proportion is in the interval .So conclude that there is insufficient evidence of a significant difference in the proportion of male and female that have at least one tattoo

This because the difference in proportion is less than $\alpha$

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3 years ago