Help please edge algebra 2

26,862÷407= <br> PLZZZZ HELPPP

tino4ka555 [31]

26,862 divided by 407 is 66

Here's the long division way that shows how you get 66

7 0

3 years ago

Identify proportional relationships

enot [183]

9514 1404 393

Answer:

No

Step-by-step explanation:

The initial balance at the beginning of the year is not zero, so the balance is not proportional to the time since the beginning of the year.

__

A proportional relationship always starts at zero when the independent variable is zero.

6 0

2 years ago

Writing lan's car can go 217 miles on 7 gallons of gas. During a drive last weekend, lan used

jolli1 [7]

Answer: Ian would have drove 91 miles using only 3 gallons of gas.

Step-by-step explanation: I used paper and pencil and used a T-chart putting one section at the top “gallons” and the other “miles”; under gallons I put 7 because the question stated with “7 gallons of gas”; under miles I put 217 because the question states that with 7 gallons of gas Ian’s car travels 217 miles so using the T-chart I want to simply the 7 gallons of gas to one gallon of gas to figure out how miles Ian’s car would go only using 3 gallons of gas; by dividing 7 by 7 giving me 1, and with a T-chart you wanna do the same thing to both sides meaning I divided 217 by 7 as well giving me 31 for 1 gallon of gas, meaning Ian’s car would travel 31 miles with only using 1 gallon of gas. After I find that answer I go to multiply the 1 under “gallons” by 3 to and again, if you do it to one side you have to do it to the other meaning I multiplied 31 my 3 as well; giving me 91. Meaning with only using 3 gallons of gas Ian’s car would travel 91 miles!

3 0

2 years ago

Determine equation (help please )<br>

kotykmax [81]

Answer: C

Step-by-step explanation:

6 0

2 years ago

Hoping to lure more shoppers downtown, a city builds a new public parking garage in the central district. The city plans to pay

andrezito [222]

Answer:

a) For this case we need to use a t distribution since we know the information about a sample and we don't know the population deviation.

b) $126-1.77\frac{15}{\sqrt{14}}=118.904$

$126+1.77\frac{15}{\sqrt{14}}=133.096$

So on this case the 90% confidence interval would be given by (118.904;133.096)

c) For this case since confidence interval include tha value of 130 so then we don't have enough evidence to conclude that the claim by the consultant is incorrect.

Step-by-step explanation:

Part a

For this case we need to use a t distribution since we know the information about a sample and we don't know the population deviation.

Part b

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

$\bar X=126$ represent the sample mean

$\mu$ population mean (variable of interest)

s=15 represent the sample standard deviation

n=14 represent the sample size

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=14-1=13$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,13)".And we see that $t_{\alpha/2}=1.77$

Now we have everything in order to replace into formula (1):

$126-1.77\frac{15}{\sqrt{14}}=118.904$

$126+1.77\frac{15}{\sqrt{14}}=133.096$

So on this case the 90% confidence interval would be given by (118.904;133.096)

Part c

For this case since confidence interval include tha value of 130 so then we don't have enough evidence to conclude that the claim by the consultant is incorrect.

6 0

3 years ago