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3 years ago

Sally begins hiking at an elevation of 224 feet. Then, she descends 131 feet

Mathematics

1 answer:

Tatiana [17]3 years ago

6 0

Answer:

-3 feets

Step-by-step explanation:

Given the following :

Starting point = 224 feets

Then descends 131 feets

Then climbs 67 feets higher than her current position

Then descends 163 feets

Addition sentence to describe the situation :

224feets + (-131)feets + 67feets + (-163)feets

Negative (-) points represents descent

224feets - 131feets + 67feets - 163feets = - 3feets

This means Sally is - 3 feets below her initial position.

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Pls helpppppp for brainly

Varvara68 [4.7K]

Answer:

$\frac{6}{8}$ or $\frac{3}{4}$

Step-by-step explanation:

Convert the mixed numbers into improper fractions.

$2\frac{3}{8}-1\frac{5}{8}=\frac{19}{8}-\frac{13}{8}$

Since the two fractions have the same denominator, just subtract the numerators.

$\frac{19}{8}-\frac{13}{8}=\frac{6}{8}$

If required, rewrite the fraction in simplest form.

$\frac{6}{8}=\frac{3}{4}$

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3 years ago

The length of a rectangle is 4 more than twice the width. The perimeter is 74 feet. Find the length and width of the rectangle.

mafiozo [28]

(2*length)+(2*width)=perimeter
length=4+2w
(2(4+2w))+(2(w))=74
74=(8+4w)+(2w)
74=6w+8
66=6w
w=11
length=4+2(11)
l=4+22
l=26

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3 years ago

Tickets for 2 adults and 4 children at a theme park cost £152.

beks73 [17]

hope it helps!!!!

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3 years ago

Read 2 more answers

The length of the human pregnancy is not fixed. It is known that it varies according to a distribution which is roughly normal,

fgiga [73]

Answer:

a) Figure attached

b) $P(234$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(234$

And we can find this probability with this difference:

$P(-2$

An we know using the graph in part a that this area correspond to 0.95 or 95%

c) $P(250$

And we can find this probability with this difference:

$P(-1$

An we know using the graph in part a that this area correspond to 0.95 or 34+34+13.5+2.35%=83.85%

d) $P(X$

And using the z score we got:

$P(X$

And that correspond to approximately 0.15%

Step-by-step explanation:

Part a

For this case we can see the figure attached.

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Part b

Let X the random variable that represent the length of human pregnancy of a population, and for this case we know that:

Where $\mu=266$ and $\sigma=16$

We are interested on this probability

$P(234$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(234$

And we can find this probability with this difference:

$P(-2$

An we know using the graph in part a that this area correspond to 0.95 or 95%

Part c

$P(250$

And we can find this probability with this difference:

$P(-1$

An we know using the graph in part a that this area correspond to 0.95 or 34+34+13.5+2.35%=83.85%

Part d

We want this probability:

$P(X$

And using the z score we got:

$P(X$

And that correspond to approximately 0.15%

5 0

3 years ago

What is the meaning of the slope of mr taylor's line? pls help! a lot of points

Sedaia [141]

Answer:

The slope is the percentage of test score per number of days absent

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have

y -----> is the percentage of test score

x ----> is the number of days absent

That means -----> The slope is the percentage of test score per number of days absent

In this problem the slope is negative

If the percentage test score increases----> the number of days decreases

If the percentage test score decreases----> the number of days increases

7 0

3 years ago