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4 years ago

Which strategy should be used to correctly solve this problem?

Mathematics

1 answer:

Veronika [31]4 years ago

4 0

C should be the answer
Pikazard out!
Peace

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Plz show work to get brainliest

gogolik [260]

Answer:

45 students speak Spanish at Francis Lewis High School

Step-by-step explanation:

Option1:

$\frac{72}{400} = \frac{x}{250}$

18000 = 400x

x = 45 students speak Spanish at Francis Lewis High School

Option2:

72 ÷ 400 = 0.18

0.18 * 250 = 45 students speak Spanish at Francis Lewis High School

4 0

3 years ago

Help fast please I need to finish this before tomorrow and I need help

nevsk [136]

The correct answer is 2

7 0

3 years ago

What is 1.25 in standard form?

Irina-Kira [14]

I’m not sure but I think it’s 1.25 x 10^0

3 0

3 years ago

Read 2 more answers

The number of "destination weddings" has skyrocketed in recent years. For example, many couples are opting to have their wedding

melamori03 [73]

Answer:

We conclude that the mean wedding cost is less than $30,000 as advertised.

Step-by-step explanation:

We are given the following data set:(in thousands)

29100, 28500, 28800, 29400, 29800, 29800, 30100, 30600

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{236100}{8} = 29512.5$

Sum of squares of differences = 3408750

$S.D = \sqrt{\frac{3408750}{7}} = 697.82$

Population mean, μ = $30,000

Sample mean, $\bar{x}$ = $29512.5

Sample size, n = 8

Alpha, α = 0.05

Sample standard deviation, s = $ 697.82

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 30000\text{ dollars}\\H_A: \mu < 30000\text{ dollars}$ We use one-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{29512.5 - 30000}{\frac{697.82}{\sqrt{8}} } = -1.975$

Now,

$t_{critical} \text{ at 0.05 level of significance, 7 degree of freedom } = -1.894$

Since,

$t_{stat} < t_{critical}$

We fail to accept the null hypothesis and reject it.

We conclude that the mean wedding cost is less than $30,000 as advertised.

8 0

4 years ago

Nancy and Linda go to there favorite restaurant. Nancy has a $5 off coupon to use for her purchase of $30. Linda has a 10% off c

Rasek [7]

Answer:

40 i think i hope i helped

Step-by-step explanation: 30+25=55 10+5=15 15-55=40

3 0

3 years ago