Michelle's heart rate is 12 beats every 10 seconds. What is her heart rate in beats per MINUTE (bpm)?

What is the y intercept in y = 4/5 x- 7

zhenek [66]

Format: y = mx + b
b = y intercept
Answer: y intercept is -7

3 0

3 years ago

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4/√8+3<br>please this little guy wants to disturb me,help, thanks.

Mazyrski [523]

Answer:

$\sqrt{2} + 3$

Step-by-step explanation:

SIMPLIFY the radical expression...

SO IT'S

$\frac{4}{2 \sqrt{2} } + 3$

Reduce the fraction with 2

Now it's

$\frac{2}{ \sqrt{2} } + 3$

Rationalize the denominator...

SO IT WILL BE

$\sqrt{2} + 3$

EASY EXPLANATION...

GAVE ME THE BRAINLIEST IF MY ANSWER WAS HELPFUL...

Sᴋ᭄Sᴀᴍɪʀᴮᴼˢˢ

7 0

3 years ago

In a city known for many tech start-ups, 311 of 800 randomly selected college graduates with outstanding student loans currently

Allushta [10]

Answer:

Null hypothesis: $p_{1} - p_{2}=0$

Alternative hypothesis: $p_{1} - p_{2} \neq 0$

$z=\frac{0.389-0.418}{\sqrt{0.403(1-0.403)(\frac{1}{800}+\frac{1}{800})}}=-1.182$

$p_v =2*P(Z$

Comparing the p value with the significance level given $\alpha=0.05$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say that we don't have significant difference between the two proportions.

Step-by-step explanation:

1) Data given and notation

$X_{1}=311$ represent the number college graduates with outstanding student loans currently owe more than $50,000 (tech start-ups)

$X_{2}=334$ represent the number college graduates with outstanding student loans currently owe more than $50,000 ( biotech firms)

$n_{1}=800$ sample 1

$n_{2}=800$ sample 2

$p_{1}=\frac{311}{800}=0.389$ represent the proportion of college graduates with outstanding student loans currently owe more than $50,000 (tech start-ups)

$p_{2}=\frac{334}{800}=0.418$ represent the proportion of college graduates with outstanding student loans currently owe more than $50,000 ( biotech firms)

z would represent the statistic (variable of interest)

$p_v$ represent the value for the test (variable of interest)

$\alpha=0.05$ significance level given

2) Concepts and formulas to use

We need to conduct a hypothesis in order to check if is there is a difference in the two proportions, the system of hypothesis would be:

Null hypothesis: $p_{1} - p_{2}=0$

Alternative hypothesis: $p_{1} - p_{2} \neq 0$

We need to apply a z test to compare proportions, and the statistic is given by:

$z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}$ (1)

Where $\hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{311+334}{800+800}=0.403$

3) Calculate the statistic

Replacing in formula (1) the values obtained we got this:

$z=\frac{0.389-0.418}{\sqrt{0.403(1-0.403)(\frac{1}{800}+\frac{1}{800})}}=-1.182$

4) Statistical decision

Since is a two sided test the p value would be:

$p_v =2*P(Z$

Comparing the p value with the significance level given $\alpha=0.05$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say that we don't have significant difference between the two proportions.

6 0

3 years ago

Which equation represents a line that passes through 4 1/3 and has a slope of 3/4

Firdavs [7]

Answer:

B

Step-by-step explanation:

equation of a line =

y-y1=m(x-x1)

where m is the gradient and X1 and y1 are the points on the line.

slope= gradient

y-1/3 = 3/4 (x-4)

3 0

4 years ago

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Find the slope of a line parallel to the line containing (-6.1) and (3,-2).

aleksley [76]

Find what is in the middle of them from where the lines meet

6 0

3 years ago