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3 years ago

I need help ASAP (Screenshot)

Mathematics

2 answers:

Liono4ka [1.6K]3 years ago

8 0

i belive it is -7 this may be your answer

Allisa [31]3 years ago

3 0

-7 because the slope is 3

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Suppose an automotive repair company wants to determine the current percentage of customers who keep up with regular vehicle mai

Nina [5.8K]

Answer: 1692

Step-by-step explanation:

Formula to find the sample size :

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

Given : Confidence level : $(1-\alpha)=0.90$

⇒ significance level = $\alpha= 0.10$

z-value for 90% confidence interval (using z-table)= $z_{\alpha/2}=1.645$

Prior estimate of the population proportion (p) of customers who keep up with regular vehicle maintenance is unknown.

Let we take p= 0.5

Margin of error : E= 2%=0.02

Now, the required sample size will be :

$n=0.5(1-0.5)(\dfrac{1.645}{0.02})^2$

Simplify , we get

$n=(0.25)(6765.0625)=1691.265625\approx1692$

Hence, the required sample size = 1692

8 0

4 years ago

Read 2 more answers

Anyone know the answer to anyone of these 3 questions

KonstantinChe [14]

4.) y=2
5.) x=0
6.) x=5
Hope this helps
Need any more help? PM me

8 0

3 years ago

Two buses, bus B and bus B, both use the same bus stop. Bus A runs every 10 minutes. Bus B runs every 14 minutes. Both buses are

Greeley [361]

Answer:

Both buses will be at the bus stop at 11am, as said in the question

Then next at 12:10am

Step-by-step explanation:

Work out the times for bus B until you find one ending in a 0, that's the time they both stop (bus A is every 10 minutes and will always end with a 0)

So bus B:

11.14, 11.28, 11.42, 11.56, 12.10

6 0

3 years ago

40% of the students in a class are girls and the number of boys is 24 find the total number of students and the number of girls

navik [9.2K]

Answer:

Girls = 16

Total students = 40

Step-by-step explanation:

40% of the students are girls, this means 60% of the students are boys.

To find the number of girls, setup a proportion using the percentages and actual number of students in the class. I am going to make the numerator the numbers that go with the girls and the denominator will be the numbers that go with the boys.

Also let's convert the percentages to decimals by moving the decimal two places left.

40% = 0.4 and 60% = 0.6

$\frac{.4}{.6} =\frac{g}{24} \\.6g=9.6\\\frac{.6g}{.6} =\frac{9.6}{.6} \\g=16$

Now let's find the total number of students by adding the number of girls to the number of boys.

16 + 24 = 40

7 0

2 years ago

Solve the equation 5 + sqrtx-4 =2•

m_a_m_a [10]

Answer:

Is sqrtx the variable? if so then the answer is 1. If not then i would need more information.

Step-by-step explanation:

3 0

3 years ago