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3 years ago

Drag each scenario to show whether the final result will be greater than the original

Mathematics

1 answer:

Hoochie [10]3 years ago

7 0

A $20 decrease followed by a $20 increase - original value

A 75% decrease followed by a 50% increase - less than the original value

A 50% increase followed by a 33 1/3% decrease - greater than the original value

A 60% increase followed by a 40% decrease - greater than the original value

A 100% increase followed by a 33 1/3% decrease - greater than the original

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Steve is 5 times as old as Janis. In 12 years, he will be twice as old as she will be then. How old are they now?

Alex17521 [72]

Write this story as equations:

s = 5j
(s+12) = 2*(j+12)

Then solve:

5j+12 = 2j + 24 => 3j = 12 => j=4, s=5*4=20

Steve is 20, Janis is 4
In 12 years they will be 32 and 16

6 0

4 years ago

Your friend is about to begin an introductory chemistry course at his university. The course has collected data from students on

Minchanka [31]

Answer:

The percentage of students sudy 34 hours or more is 0.62%

Step-by-step explanation:

The Normal Distribution

The bell curve or normal distribution is frequently used to model the probability of natural random events. The normal distribution $N(\mu,\sigma)$ is characterized by two parameters:

$\mu$ is the mean value

$\sigma$ is the standard deviation

The study times in hours for the final exam is modeled as a normal distribution N(24,4). We are required to find the percentage of students study 34 hours or more, or P(X>34).

The values for the cumulative probability are given by tables or digital means like Excel where we can get the left-tail or P(X<Xo). To compute the right-tail or P(X>Xo) we use this relation

$P(X>Xo) =1-P(X$

The Excel formula to find the left-tail cumulative probability is called

NORM.DIST(x,mean,standard_dev,cumulative)

To solve the question, we used:

NORM.DIST(34,24,4,TRUE)=0.9938

Thus:

$P(X>34) =1-P(X$

The percentage of students study 34 hours or more is 0.62%

6 0

3 years ago

7X +3 equals 17: solve for x Help!

Talja [164]

7X +3 equals 17: solve for x

Help! X= 2

5 0

3 years ago

28 is what percent of 51

AVprozaik [17]

I got 54.90196 for that problem

3 0

3 years ago

PLEASE HELP Solve the following problems: Find the indicated values, mAB, m ABC, mBAC, mACB

alekssr [168]

It already shows that AB is 49°

in order to find ABC you must first find BC

360 - (AC + AB) = BC
360 - 156 = BC
204° = BC

NOW add BC with AB

49 + 204
253

angle ABC is 253°

now to find BAC add AB and AC
49 + 107 = 156°

angle BAC is 156°

FINALLY to find ACB add AC and CB

107 + 204
311°

angle ACB is 311°

4 0

3 years ago

Read 2 more answers