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3 years ago

I really need help! ANYONEEEEE

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

5 0

Answer:

I think Its 47? if Im wrong Im very sorry.

Step-by-step explanation:

I added all of the numbers, and the sides without numbers, its simple just add all of the numbers together, I think

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Which correlation does the two-way table suggest?

natima [27]

Answer:

The answer is C.

Hope this helps :)

<em>-ilovejiminssi♡</em>

6 0

3 years ago

A sample of 100 women isâ€‹ obtained, and their heightsâ€‹ (in inches) and pulse ratesâ€‹ (in beats perâ€‹ minute) are measured.

Tanzania [10]

Answer:

$\hat y= 18.5 +0.890(65)=76.35$

Step-by-step explanation:

For this case we have a linear model given by:

$\hat y= 18.5 +0.890 X$

Where X= represent the height.

Y= represent the beats per minute

And the slope is given by $\beta_1 =0.890$ and the intercept $\beta_0 =18.5$

We have the mean for x and y given also $\bar X= 62.9$ $\bar Y= 73.4$

And in order to find the best predicted value we just need to replace the value of X= 65, and we got this:

$\hat y= 18.5 +0.890(65)=76.35$

If we want a confidence interval for the response variable when the predictor variable is x, is given by this formula:

$\hat y \pm \sqrt{1+\frac{1}{n} +\frac{(x-\bar X)^2}{(n-1)s^2_x}}$

And if we replace we got this:

$76.35 \pm \sqrt{1+\frac{1}{100} +\frac{(65-62.9)^2}{(100-1)s^2_x}}$

But for this case since we don't have the deviation we can just express it like this.

7 0

3 years ago

Can someone help me please

tigry1 [53]

Bro okay

0.8($8/book x 6 books) = $38.40

7 0

3 years ago

At 2:00 PM a car's speedometer reads 30 mi/h. At 2:20 PM it reads 50 mi/h. Show that at some time between 2:00 and 2:20 the acce

storchak [24]

Answer:

The correct answer will be "60 min/hour".

Step-by-step explanation:

At time 2:00 PM

A car reads = 30 mi/h

At time 2:20 PM

A car reads = 50 mi/h

Now,

At time 2:00 PM

t = 0

At time 2:20 PM

t = $\frac{1}{3}$

$v(0)=30$

$v(\frac{1}{3})=50$

For MVT,

$v'(c)=\frac{v(\frac{1}{3} -v(0))}{(\frac{1}{3} )}$

$=\frac{20}{\frac{1}{3} }$

$=60 \ min/hour$

5 0

3 years ago

Can 12m, 35m and 37m make a right triangle

antoniya [11.8K]

Answer:

YES

Step-by-step explanation:

Explanation:

If this is a right triangle we can then substitute the sides of the triangle (12 and 35) and the hypotenuse (37) into the Pythagoras Theorem and the two sides of the equation will be equal. If this is not a right triangle the two sides of the equation will not be equal.

The Pythagoras Theorem is

Substituting we get:

⋅

144

1225

1369

Because these are equal this is a right triangle.

3 0

3 years ago

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