Thursday

February 23, 2017
Total # Posts: 3,409

**MATH**

the square of a number is equal to the sum of 21 and 4 times the number. find the number WHATS THE EQUATION (AM CONFUSED ?)

*January 4, 2012*

**MATH PLEASE HELP**

its 4 and 5

*January 4, 2012*

**MATH PLEASE HELP**

the sum of the squares pf two postive consecutive even integers is 41. Find the integers.

*January 4, 2012*

**Economics (inflation)**

Hello! Could someone please check my answers for the first 2 problems and help me out with the 3rd? Thanks! 1. If the CPI in 1863 was 9 and the CPI in 2000 was 171.9, how much has inflation increased (%) since 1863? I used the inflation rate equation and got a 1898.89% ...

*January 4, 2012*

**Calculus I Quick Optimization Problem**

Could you please explain this problem step by step, thank you! You are planning to make an open rectangular box that will hold a volume of 50 cubed feet. What are the dimensions of the box with minimum surface area?

*January 3, 2012*

**Living environment(check please)**

When the food relationship in a habitat are illustrated by means of diagram, the result is always a complicated web like pattern. This is due to the fact that 1 many consumers are adapted to use more than one food source 2 producer organisms always outnumber the consumer ...

*January 3, 2012*

**Living environment**

IN a natural community in New York State, the producer organisms might include (1) bacteria , fungi, and viriuses (2) deer, rabbits , and squirrls (3) grasses, maple trees , and weds (4) trout, peas, and earthworms I the answer 3 Which sequence illustrates a generalized food ...

*January 3, 2012*

**Living environment**

The apperance of the greatest percentageof white mice occured (1) before the maximum number of days of snow cover (2)at the same time as the maximum number of days of snow cover (3) after the maximum number of days of snow cover (4) both before and after the maximum number of ...

*January 3, 2012*

**Living environment**

1.All of Earth's water, land, and atmosphere within which life exists is known as a population b. an ecosystem c.the biosphere d. a biotic community IS THE ANSWER C

*January 3, 2012*

**MATH plz helo check my answer**

-3 ≤ 2x - 5 < 13 i thing the answer is 1 < x < 9 and how would you graph this on a number line so MY NUMBER LINE IS 1 TO 9, SO AT 1 i have a closed circle and at 9 i have a open circle and its shaded in is it right

*January 2, 2012*

**ALGEBRA**

Factor: 2x^2 - 5x + 2 am confused with this problem?

*December 30, 2011*

**MATH**

thanks

*December 30, 2011*

**help check please**

PLEASE CHECK THESE ANSWERS

*December 25, 2011*

**ALGEBRA 1**

ARE THESE ANSWERS RIGHT ? Express as a trinomial: (2x-3)(x+7) IS THE ASNWER 2x^2 + 11x - 21 WHAT IS THE VALUE OF 2 times 5^-2 IS THE ANSWER 2/25 DIVIDE: x/x^2-49 divide by 5x^3/x^2 + 9x + 14 IS THE ANSWER x+2/5x^2(x-7)

*December 25, 2011*

**MAth**

thanks

*December 25, 2011*

**ALGEBRA**

thanks

*December 23, 2011*

**ALGEBRA**

how to do this find the volume of a cylinder if the radius is 8 inches and the height is 10in (ANSWER MAY BE LEFT IN TERMS OF PIE)

*December 23, 2011*

**SraJMcGin please help with Spanish, thank you!**

Can you please correct these two sentences, thank you for the help earlier by the way. =) La mayoría de sus pinturas marinas y meticulosas son oleo en lienzo The majority of his meticulous, marine paintings are oil on canvas. La verdad es que la marina yo no le importa...

*December 18, 2011*

**Spanish**

Can someone please proofread a biography I wrote? The English translation is below the Spanish. Salvador Abril y Blasco era un marinista que ya gozaba de buen reputación en el mundo artístico, y que ha obtenido algunas medallas en las Exposiciones Nacionales. &...

*December 18, 2011*

**algebra**

N(x)=-0.6^2+15.6x+12, where x is the number of days since the concert was first announced, When will daily ticket sales peak and how many tickets will be sold that day ticket sales peak- number of tickets sold-

*December 17, 2011*

**algebra**

The width of a rectangle is 3ft less than the lenght. The area is 4ft^2. Find the lenght and the width

*December 17, 2011*

**algebra**

The number of tickets sold each day for upcoming perfomance of Handel's Messiah is given by N(x)=-0.6x^2+15.6x+12, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day?

*December 17, 2011*

**algebra**

1.Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in stadard form ax^2+bx+c=0 Solution 7, only solution 2.The width of a rectangle is less than the length. The area is 4ft^3. Find the length and the width.

*December 17, 2011*

**psy**

On p. 84 of the text, in the Thinking Clearly section, the conduction action potentials and activation of neurotransmitters is related to a row of mousetraps on a wobbly shelf. Think of another analogy you can use to describe the conduction of action potentials and activation ...

*December 15, 2011*

**english**

Fill the bags with donated gifts for the orphanage. The word BAGS is what kind of compliment? I.e. predicate adjective, direct object, indirect object, predicate nominative

*December 13, 2011*

**Statistics**

Suppose you gave a skill test to 3 different PE classes and want to know if they differ in terms of their scores. The skill tests scores are as follows: Class 1: 23, 21, 19, 22 Class 2: 18, 19, 21, 18 Class 3: 21, 20, 19, 22 Conduct an ANOVA and report the test statistic ...

*December 13, 2011*

**Finance**

why are dates on financial statements important?

*December 12, 2011*

**math**

the difference between a square root inside a bracket and one outside a bracket

*December 10, 2011*

**English**

I need help understanding adverb clauses...

*December 8, 2011*

**Chemistry**

Sorry still confused. Here's the problem: 0.249g of a diatomic element occupies a volume of 125mL at 120 degrees Celsius and 2.00 atm. This element IS? I used PV/RT =n so: 2.00 atm (.125L)/0.0821L*atm/mol*K (393K) = 11.96 then 0.249/11.96 =20.1 which is Neon. It isn't ...

*December 8, 2011*

**physics**

Suppose the time taken for light to bounce to and fro between the parallel mirrors of a light clock is 1 second, in the frame of reference of the light clock. As seen by another observer moving at high speed at right angles to the to-and-fro motion of the bouncing light, the ...

*December 8, 2011*

**English**

Select the gerund phrase in the sentence below. Then, determine the noun function of the gerund. Writing a research paper sounds difficult

*December 7, 2011*

**Chemistry**

Got it! H2S is bent. Thank you!

*December 7, 2011*

**Chemistry**

Are these shapes correct?PH3-trigonal pyramidal, CHCl3-tetrahedral, H2S-linear and PO4^-3-tetrahedral?

*December 7, 2011*

**chemistry**

Thank you! Sorry about duplicate entries-laptop acting funny.

*December 7, 2011*

**chemistry**

0.249 g of a diatomic element occupies a volume of 125mL at 120 degrees C and 2.00 atm. This element is? Please help. I'm lost.

*December 7, 2011*

**chemistry**

0.249 g of a diatomic element occupies a volume of 125mL at 120 degrees C and 2.00 atm. This element is? Please help. I'm lost.

*December 7, 2011*

**chemistry**

0.249 g of a diatomic element occupies a volume of 125mL at 120 degrees C ad 2.00 at. This element is? Please help. I'm lost.

*December 7, 2011*

**Chemistry**

Thank you!

*December 6, 2011*

**Chemistry**

A gas occupies a volume of 0.500L at 125 degrees Celsius and 0.443 atm. What mathematical expression will yield the correct temperature at 0.750 L and 0.689 atm? Is it the combined gas law of P2V1/T1=P2V2/T2?

*December 6, 2011*

**Physics**

A racing car has a mass of 1540 kg. What is its kinetic energy if it has a speed of 110 km/h? Assume that air resistance is negligible.

*December 6, 2011*

**Math**

Draw a curve and shade the area between z= -.35 and z= 35

*December 6, 2011*

**math**

Draw a curve and shade the area between z=1.15 and z=1.35

*December 6, 2011*

**Intermediate Algebra**

I need to know what the perpendicular equation is to x-3y=6 with the line through (-2,-9)

*December 6, 2011*

**Intermediate Algebra**

I need to know what the perpendicular equation is to x-3y=6 with the line through (-2,-9)

*December 6, 2011*

**math**

There are n people in a room. Each person will shake hands with every other person once and only once. How many hand shakes will there be?

*December 5, 2011*

**Physics**

In an electric shaver, the blade moves back and forth over a distance of 2.2 mm in simple harmonic motion, with frequency 116 Hz. Find (a) the amplitude (in mm), (b) the maximum blade speed, and (c) the magnitude of the maximum blade acceleration. I got that (a) is 1.1 mm, but...

*December 5, 2011*

**spanish**

Could someone please read my (corrected) summary in Spanish for grammar and fluidity? The English version appears below for help. Thanks! Spanish: Al principio del cuento, el narrador y su familia de braceros migratorios tenían que mudarse a Fresno porque la cosecha de ...

*December 4, 2011*

**spanish**

Could someone please proofread this summary in Spanish on a short story? The English version is also below. Thank you. Spanish: Al principio del cuento, el narrador y su familia de braceros migratorios tenían que mudarse a Fresno porque la cosecha de fresas se hab&...

*December 4, 2011*

**chemistry**

Thank you, Dr. Bob! Wish YOU would have written my chemistry book!

*December 3, 2011*

**chemistry**

Please help again. How many grams of lithium are required to completely react with 70.7 mL of N2 gas at STP when given the following reaction: 6Li + N2 = 2Li3N

*December 3, 2011*

**algebra**

During the first part of a trip a canoeist travels 71 miles at a certain speed. The canoeist travels 5 miles on the second part of the trip at the speed 5mph slower. The total time for the trip is 4hrs. Waht was the speed on each part of the trip

*December 3, 2011*

**Chemistry**

thanks! Duh! Got it! Yippie!

*December 3, 2011*

**Chemistry**

Here's how I worked it: P= ? n= 0.0155 mol v=206mL so .206L t=30C +273 is 303K then 0.0155mol *0.0821 L*atm/mol*K *303K divided by .206L which gives you 1.87 mmHg What did I do wrong?

*December 3, 2011*

**Chemistry**

What is the pressure in millimeters of mercury of 0.0155 mole of He gas with a volume of 206 mL at a temperature of 30 degrees C? I used the ideal gas law and ended up with 1.87 mmHg but it said that was wrong. Please help.

*December 3, 2011*

**algebra 2**

Write an equivalent expression using radical notation 1.(a^2b^2)^1/9 Use the laws of exponents to simplify 2.6^3/5* 6^5/10

*December 3, 2011*

**spanish**

1) un traje de baño 2)el impermeable 3)gafas de sol 4)los zapatos de tenis 5)centro comercial 6)tarjeta de crédito

*December 2, 2011*

**Chemistry**

Which is a polar covalent bond? PbCl2 or CS2?

*December 2, 2011*

**math**

Subject cars. A scale drawing if an automobile has a scale of 1 inch = 1/2 foot. The actual width of the .car is 8 feet. What is the width on the scale drawing

*December 2, 2011*

**Math**

What adds up to get 100%? 68% , 1/2 , 60% ,1/20 , 1% , 0.9 , 0.04 ,13/20 , 1/7 , 3/25 ,16% ,55% , 0.02 , 1/9 , 0.15 , 1/8 , 24% , 0.44 , 0.06 , 1/6 , 1/4 , 29% , 0.037 , 1/3 , 19% , 17/50

*December 1, 2011*

**algebra**

Darla is building a new deask. to make sure she had made a square corner, she measures 4ft. from the corner along one edge and 6ft from the corner long the othe edge . how long should the diaonal be between those two points if the corner is a right angle? (round to the nearest...

*December 1, 2011*

**algebra**

Guy wire. How long is a guy wire reaching from the top of a 24ft ploe to a point on the ground 16 feet from the pole What is the exact length? what is the lenght approximated to three decimal palces?

*December 1, 2011*

**Physics**

A 0.165-kg ball, moving in the positive direction at 10 m/s, is acted on by the impulse shown in the graph below. What is the ball's speed at 4.0 s?

*November 30, 2011*

**Math**

But we don't post to use a calculator. It says to estimate.

*November 30, 2011*

**Math**

What is 21% of 41? I think it is 10 but I'm not for sure.

*November 30, 2011*

**statistics**

Measures of Central Tendency,variability, and postion 12th Grade math class. organize the data 78,67,95,85,84,86,82,75,85,94,91,57,78,77,88,90,91,86,84,82,75,58,73,75. Then do 4 columns of Grades,Deviations,Squares,and Z-Scores

*November 30, 2011*

**statistics**

What is the probability that a student in a college of 650 students in both a math major and a computer science major ( assuming these events are independent) If there are 72 math majors and 105 computer science majors?

*November 30, 2011*

**Cert III lab skills**

Explain how to calculate preparing 250.0ml of 1.25 mol/L solution of Na2CO3(aq)

*November 29, 2011*

**Math**

Ragu ran the first 3 miles of a 5 mile race in 24 minutes. What percent of the race has he run? Please help me

*November 29, 2011*

**phi 103**

1. Logic can help analyze ethical problems. (Points : 1) True False 2. Putting an argument into premise-conclusion form can make it easier to (Points : 1) ignore the argument. think the argument is pretty. evaluate the argument. avoid the argument. 3. Karl Popper advocates, as...

*November 26, 2011*

**math**

If X=3 cm, Y=5 cm, Z=3 cm, W=5 cm, and V=2, what is the volume of the object?

*November 26, 2011*

**math**

Three cards are drawn without replacement from a well-shuffled standard deck of 52 playing cards. Find the probability that none is a face card.

*November 23, 2011*

**geometry**

Given l parallel to m, find the measures of each angle. <PTU

*November 22, 2011*

**math**

yes divide 141 by 7

*November 21, 2011*

**Biology**

describe the following processes in the plant life cycle and why they are important for the plant to complete, listing all of the plant hormones involved and describing their functions: 1) elongation of the plant shoot. 2) the process by which seeds orient themselves. 3) ...

*November 21, 2011*

**algebra**

1. Jodie biycles 5km/h faster than Predup. In the same time it takes Predup to bicycle 60km, Jodie can bicycle 75km. How fast does each bicyclist travel? 2.The officejet printer can copy Janet's dissertation in 20min. The LaserJet printer can copy the same document in ...

*November 18, 2011*

**algebra**

1. Find the LCM of (8+7), (64-49v^2), and (8-7v) 2. Find the LCM of 14x^7 and 98x^5 3. Find all numbers for which the rational expression is undefined 5/v-9

*November 18, 2011*

**algebra**

Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ratio and porportion to complete the following table. hat sizes 7 1/4 7 1/8 Head circumference (to nearest 1/5inch) 22 4/5 Head circumference (to nearest centimeter...

*November 17, 2011*

**algebra**

Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ratio and porportion to complete the following table. hat size Head circumference 7 1/4 (to nearest 1/5inch) 7 1/8 22 4/5 Head circumference (to nearest centimeter) 58

*November 17, 2011*

**algebra**

The stopping distance d of a car after the brakes are applied directly as the square of the speed r. If a car traveling 80mph can stop in 360ft, how many feet will it take the same car to stop when it is traveling 90mph

*November 17, 2011*

**algebra**

The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 58cm when the weight is 3kg, what is the distance when the weight is 8kg

*November 17, 2011*

**algebra**

The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 58cm when the weight is 3kg, what is the distance when the weight is 8kg

*November 17, 2011*

**algebra**

1. The speed of a passenger trin is 18mph faster than the speed of a freight train. The passenger train travels 260 miles in the same time it takes the feight train to travel 170 miles. Find the speed of each train.

*November 17, 2011*

**Chemistry**

Thank you so much, Dr. Bob! :)

*November 17, 2011*

**Chemistry**

Purple light in the visible region of the electromagnetic spectrum has a shorter wavelength than does the green region of the spectrum. Which of the following can you conclude? Is it: a)a photon of purple light has a higher frequency than does a photon of green light or b) ...

*November 17, 2011*

**math**

1. The stopping distance d of a car after the brakes arecapplied varies directly as the square of the speed r. If a car traveling 80 mph can stop in 360ft, how many feet will it take the same car to stop when it is traveling 90 mph. 2.The distance d when a pring is stretched ...

*November 16, 2011*

**Calculus**

A man is in a boat 4 miles off a straight coast. He wants to reach a point 10 miles down the coast in the least possible time. If he can row 4 miles per hour and run 5 miles per hour, where should he land the boat?

*November 16, 2011*

**physics**

At 15 minutes past the hour, a 50 g mouse runs up a grandfather clock and sits himself down at the end of the minute-hand. If the minute-hand for the clock is 16 cm long, what is the magnitude of the torque exerted by the mouse on the minute-hand? Give your answer in the ...

*November 15, 2011*

**Chemistry**

Yes

*November 14, 2011*

**chemistry**

For the reaction: A + 3B = 4C Which of the following provides the direct link between the amount of reactant A and the amount of product C? -coefficients in the equation -molar mass of C -the reactant B or -molar mass of A?

*November 14, 2011*

**Chemistry**

What is the electron geometry if you have 4 electron groups around the center atom?

*November 14, 2011*

**Chemistry**

A sodium cation is what?

*November 14, 2011*

**chemistry**

When gas is burned: CH4 + 2O2 = CO2 + 2H2O, how many moles of water are produced when 6.2 mol of methane are burned?

*November 14, 2011*

**chemistry**

Dr. Bob, Thank you so much for taking the time to help me. God bless all your work with us. However, I'm still confused b/c these were my choices: 0 mol NH3, 0.038 mol N2, 0.333 mol N2H4, O.150 mol NH3,~0 mol N2, 0.300 mol N2H4, ~0 mol NH3, 0.38 mol N2, 0.188 mol N2H4 and...

*November 14, 2011*

**chemistry**

In a reaction vessel, the following reaction was carried out using 0.250 mol of NH3 and 0.100 mol of N2, 4NH3(l) + N2 (g) = 3N2H4 (l) what is the compositon in moles in the vessel when the reaction is completed? Is the answer: 0 mol NH3, 0.063 mol N2, and 0.188 mol N2H4?

*November 14, 2011*

**Math**

Find the number c that satisfies the conclusion of the Mean Value Theorem: x^3+x-9 [0,2]

*November 13, 2011*

**Math**

Ming dropped a package of 8 light bulbs and 2 of the bulbs broke. Write two equivalent fractions to represent the fraction of the bulbs that broke. Please help

*November 12, 2011*

**Physics**

can someone check? Which has greater volume: 1 kg of gold or 1 kg of water? a. The gold has greater volume. b. The water has greater volume. c. Gold and water have the same volume. Is it a? I know it's not b. The stones in an arch are . . . a. rarefied b. torqued c. under ...

*November 12, 2011*

**statistics**

Post your answer first

*November 11, 2011*

**Business English**

Dear Kashi, Will you please answer the following questions about your company products advertised in October 2011 Dwell magazine? We are interested ordering some of your products such as snacks. 1.If we finally make a deal, is it possible to start importing your products at ...

*November 11, 2011*