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Paraphin [41]
3 years ago
14

The value of p in 18+6p=90 is???

Mathematics
2 answers:
anygoal [31]3 years ago
8 0

Answer:

p=12

Step-by-step explanation:

18+6p=90\:

18+6p-18=90-18

6p=72

\cfrac{6p}{6}=\cfrac{72}{6}

p=12

HOPE IT HELPS!!

Illusion [34]3 years ago
6 0

Step-by-step explanation:

HOPE IT HELPS!!!!!!!!!

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A random sample of 250 juniors majoring in psychology or communication at a large university is selected. These students are ask
fenix001 [56]

Solution :

It is given that :

Number of students in a random sample majoring in communication or psychology at an university = 250

Total number of students majoring in psychology = 100

Number of students majoring in psychology  those who are happy = 80

So number of students majoring in psychology  those who are not happy = 20

Total number of students majoring in communication = 250 - 100 = 150

Number of students majoring in communication  those who are happy = 115

So number of students majoring in psychology  those who are not happy = 35

a). Probability of the students happy with their major choices are

    $=\frac{80+115}{250}$

    = 0.78

b). Psychology major $=\frac{80+20}{250}$

                                   = 0.4

c). Probability of the students who are happy with the communication as the choice of major = $\frac{115}{250}$ = 0.46

d). Students unhappy with their choice of major given that the student is psychology major = $\frac{20}{250}$  =  0.018

8 0
2 years ago
A college-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100.
yawa3891 [41]

Answer:

The probability is  0.003

Step-by-step explanation:

We know that the average \mu is:

\mu=500

The standard deviation \sigma is:

\sigma=100

The Z-score is:

Z=\frac{x-\mu}{\sigma}

We seek to find

P(x800)

For P(x>800) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{800-500}{100}

Z=3

The score of Z = 3 means that 800 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x>800)=0.15\%

For P(x<200) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{200-500}{100}

Z=-3

The score of Z = -3 means that 200 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x

Therefore

P(x800)=P(x800)

P(x800)=0.0015 + 0.0015

P(x800)=0.003

6 0
3 years ago
Could someone please help me with this it’s due tonight please
Whitepunk [10]

Answer:

3/4 of the way from A to B = (-\frac{7}{2}, \frac{5}{4}) or (-3.5, 1.25)

Step-by-step explanation:

Please see attached images below for explanation:

7 0
3 years ago
If Siobhan hits a 0.25 kg volleyball with 0.5 N of force, what is the acceleration of the ball?
krek1111 [17]

Answer:

Force = mass x acceleration

Therefore,

acceleration = Force / mass

Acceleration = 0.5 / 0.25

Acceleration = 2 m/s²

Step-by-step explanation:

Force = mass x acceleration

Therefore,

acceleration = Force / mass

Acceleration = 0.5 / 0.25

Acceleration = 2 m/s²

5 0
2 years ago
Whats relative frequency
4vir4ik [10]

The relative frequency of an event is defined as the number of times that the event occurs during experimental trials, divided by the total number of trials conducted.

4 0
3 years ago
Read 2 more answers
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