Math Answers

find the range variance and standard deviation of 2.1,3.0,1.9,1.5,4.8

the equation x^2+bx+c=0 has roots -5 and 7. find the value of b and the value of c.

1. On a map, the distance between the two towns is 2.6 cm. The scale of the map is 1 cm: 50 km. What is the actual distance between the two towns ? and whats the process to get that answer

An algorithm is a _________ set of precise instructions for performing computation.

 PROBLEM: 40 boys and 28 girls stand in a circle, hand in hand, all facing inward. Exactly 18 boys give their 

right hand to a girl. 

A. How many boys give their left hand toa a girl? 

B. What if 28 boys give their right hand to a girl? 

C. What will be your answer if both boys and girls are 28 in number?

 Use inductive reasoning to make a conjecture about a rule that relates the number you selected to final answer. Try to prove your conjecture by using deductive reasoning.

1. Pick a number

Double it

Subtract 20 from the answer

Divide by 2

Subtract the original number Result:

2. Pick a number Multiply it by 9

Add 21

Divide by 3

Subtract three times the original number Result:

3. Pick a number

Add 6

Multiply the answer by 9

Divide the answer by 3

Subtract 3 times the original number Result

 Use the inductive reasoning to predict the next term in each list.

1. 4, 8, 12, 16, 20, 24, ?

2. 5, 11, 17, 23, 29, 35, ?

3. 1, 8, 27, 64, 125, ?

4. -2, 3, -4, 5, -6, 7, ?

5. 2, 5, 10, 17, 26, ?

6. Consider a population of size 10 with population mean, =140 and population Standard deviation, = 30 and all possible samples of size 5. Find the following if sampling is without replacement.

A. Number of samples.

B. Mean of the sampling distribution of the sample mean.

C. Standard deviation of the sampling distribution of the sample means.

A computer retailing company specializes in the sale of jump drives to community college students.

The demand function for jump drives is P= X² +10X +1000

 dollars

For the same company the average cost function is given as: c= 22 +36x +100 -2/x

 dollars

Where p is the price in dollars and x represents units of output.

i)                  Determine the revenue function                                        

ii)                Determine the cost function                                              

iii)              Determine the profit function                                            

iv)              Find the price and output that will maximize profit.         

v)                 Find the maximum     profit                                                                                      

show that factorial function is promitive recursive