# Posts by vilma

Total # Posts: 31

**math**

30 munites

*February 28, 2016*

**math**

It takes a hose 3 minutes to fill a rectangular aquarium 10 inches long, 11 inches wide, and 13 inches tall. How long will it take the same hose to fill an aquarium measuring 22 inches by 25 inches by 26 inches?

*February 28, 2016*

**math**

a fair of die is tossed 180 times. Find the probability P that the face 6 will appear between 29 and 32 times inclusive?

*October 27, 2012*

**math**

Suppose the income (in tens of thousands of pesos) of employees at University X can be approximated by a continuous distribution with density f(x) = ( 2x2; if x 2 0; if x < 2 Find the probability that a randomly chosen employee has an income between P30,000 ...

*October 26, 2012*

**math**

A class of college freshmen is composed of 110 students. Among these students, 75 are taking English, 52 are taking history, 50 are taking math, 33 are taking English and history, 30 are taking English and Math, 22 are taking History and Math, and 13 are taking all three ...

*October 26, 2012*

**math**

Suppose the income (in tens of thousands of pesos) of employees at University X can be approximated by a continuous distribution with density f(x) = ( 2x2; if x 2 0; if x < 2 Find the probability that a randomly chosen employee has an income between P30,000 ...

*October 26, 2012*

**math**

A class of college freshmen is composed of 110 students. Among these students, 75 are taking English, 52 are taking history, 50 are taking math, 33 are taking English and history, 30 are taking English and Math, 22 are taking History and Math, and 13 are taking all three ...

*October 26, 2012*

**math**

Determine whether each of the following statements is true or false. Justify your answer. (a) x 2 fxg (b) fxg fxg (c) fxg 2 fxg (d) fxg 2 ffxgg (e) ; fxg (f) ; 2 fxg 2. 4 pts. Consider the experiment of rolling two distinguishable fair dice. Let A be the event ...

*October 26, 2012*

**math**

Suppose the income (in tens of thousands of pesos) of employees at University X can be approximated by a continuous distribution with density f(x) = ( 2x2; if x 2 0; if x < 2 Find the probability that a randomly chosen employee has an income between P30,000 ...

*October 26, 2012*

**math**

a fair die is tossed 180 times. Find the probability P that the face 6 will appear between 29 and 32 times inclusive.

*October 26, 2012*

**math**

Let x be the standard normal random variable. find the following: a)P(0)<x<1.42) b)P(-0.73<x<0) c)P(-1.37<x<2.01) d)P(x>1.13)

*October 26, 2012*

**Chemistry**

how many grams of ethylene (C2H4) are required for the complete reaction of 31.7 grams of hydrogen gas?

*October 1, 2012*

**Algebra**

I posted this question earlier incorrectly: I could still use some help figuring it out. A student deposits $6,000 in a savings account with 6% continuously compounded interest. How many years must he wait until the balance has doubled?

*June 27, 2012*

**algebra**

This is a problem about logarithms: I'm completely confused as to what to do here: The logarithmic form of 84 = 4,096 is log8 4,096 = 4 Write the logarithmic form of x5 = the value of this quantity Explain the steps of conversion.

*June 26, 2012*

**Algebra**

I have no idea how to even begin writing this out. I need help desperately. A student deposits $6,000 in a savings account with x% continuously compounded interest. How many years must he wait until the balance has doubled?

*June 26, 2012*

**Algebra**

Find two consecutive odd numbers that add to 208, when the smaller number is added to five times the larger number.

*June 19, 2012*

**Algebra**

I need help doing this problem, should I not get the same answer with each technique? Please help. What three techniques can be used to solve a quadratic equation? Demonstrate these techniques on the equation: 2x² + 3x + 1 = 0

*June 17, 2012*

**Algebra**

I'm having a problem dividing 2x^3 - x^2 + 3x -1) ÷ (x + 2)

*June 17, 2012*

**Algebra**

Pulling my hair, need help! For the systems of linear equations in questions the following questions: Determine how many solutions exist Use either elimination or substitution to find the solutions (if any) 4x = 8 and 5y = 15 0.2x + 0.4y = 1.7 and 8.3x - 6.3y = -4.3 x/3 - y/5...

*June 10, 2012*

**Algebra**

I have major issues with problems like these,please I need help. For these systems of linear equations in questions -Determine how many solutions exist -Use either elimination or substitution to find the solutions (if any) 1. y = 2x + 3 and y = -x - 4 2. 2x + 3y = 8 and 3x + ...

*June 10, 2012*

**Algebra**

calculate the slope, x-intercept, and y-intercept for 4.2x + 3.8y = 1.9

*June 5, 2012*

**Algebra**

calculate the slope, x-intercept, and y-intercept for 3x = -2

*June 5, 2012*

**Algebra**

A temperature of 30 degrees F is equivalent to 271.89 degrees K, while a temperature of 94 degrees F is equivalent to 307.44 degrees K. Find the equation converting Kelvin temperature to Fahrenheit. What is the Fahrenheit temperature when it is 212 degrees K?

*June 3, 2012*

**Algebra**

Find an equation in slope-intercept form passing through the points (-10, 23) and (6, -11).

*June 2, 2012*

**Algebra**

The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the first half of the ...

*May 28, 2012*

**Algebra**

The area of a rectangle is 48 square cm. If the length is 8 cm greater than the width, what are the dimension of the rectangle?

*May 26, 2012*

**Algebra**

A man buys four DVDs for $75.68, including 6% sales tax. How much did each DVD cost?

*May 26, 2012*

**Algebra**

Solve the quadratic equation by the square root property (2x - 1)2 = 25

*May 26, 2012*

**Algebra**

ABC phone company charges $16 per month plus 8¢ per minute of phone calls. XYZ phone company charges $10 per month plus 11¢ per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company the better deal?

*May 26, 2012*

**Algebra**

ABC phone company charges $16 per month plus 8¢ per minute of phone calls. XYZ phone company charges $10 per month plus 11¢ per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company the better deal?

*May 25, 2012*

**Math**

how could you find the measurements of the frame with a 16 inch perimeter antd the greatest possible area?

*March 10, 2011*

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