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4 years ago

Write an inequality in slope intercept form for the graph below. if necessary use <= or >=

Mathematics

1 answer:

Mekhanik [1.2K]4 years ago

7 0

Consider this option:
1. the equation of given line is y=-x-3 (it is easy to find it using points (0;-3)&(-3;0)).
2. according to the equation of line: y≥-x-3

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. You are interested in the amount of time teenagers spend weekly working at part-time jobs. A random sample of 15 teenagers was

agasfer [191]

Answer:

$t=\frac{147.3-120}{\frac{50}{\sqrt{15}}}=2.115$

Now we can calculate the degrees of freedom

$df=n-1=15-1=14$

If we find a critical value in the t distribution with 14 degrees of freedom who accumulates 0.05 of the area in the right we got $t_{critc}= 1.761$

Since the calculated value is higher than the critical value we have enough evidence to conclude that the true mean is significantly higher than 120 minutes for the average time of part time jobs

Step-by-step explanation:

Information given

$\bar X=147.3$ represent the sample mean for the amount of time spent at part time jobs

$s=50$ represent the sample standard deviation

$n=15$ sample size

$\mu_o =120$ represent the value to check

$\alpha=0.05$ represent the significance level

t would represent the statistic

$p_v$ represent the p value for the test

System of hypothesis

We want to analyze if the true mean for the amount of time spent at part time jobs is higher than 120, the system of hypothesis would be:

Null hypothesis: $\mu \leq 120$

Alternative hypothesis: $\mu > 120$

Since we don't know the population deviation the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

Replacing the info given we got:

$t=\frac{147.3-120}{\frac{50}{\sqrt{15}}}=2.115$

Now we can calculate the degrees of freedom

$df=n-1=15-1=14$

If we find a critical value in the t distribution with 14 degrees of freedom who accumulates 0.05 of the area in the right we got $t_{critc}= 1.761$

Since the calculated value is higher than the critical value we have enough evidence to conclude that the true mean is significantly higher than 120 minutes for the average time of part time jobs

4 0

3 years ago

How many grams in three quarters of kilo?

Romashka [77]

Answer:

0.75 kilogram = 750 grams

+if this helped you, please consider marking it the Brainliest in order to help me unlock the next achievement. thank you.

8 0

3 years ago

I'm in algebra 1 please help

lbvjy [14]

I believe it's r I'm really sorry if its wrong

7 0

3 years ago

Question is -4x + 14 = 54

777dan777 [17]

Answer: x = -10

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

An unknown number y is 12 more than an unknown number x. The number y is also x less than 17. The equations to find x and y are

Aloiza [94]

Answer:

4) add the equations to eliminate x

Step-by-step explanation:

After adding the equations then you can use the value you found for y to substitute back into one of the equations in order to find x

5 0

3 years ago