Posts by lee

Total # Posts: 926

algebra
what is the solution 1/2x^2-x+5=0 could someone please explain

algebra
thank you

algebra
simplify the expression -6+i/-5+i Could someone explain the steps?

algebra
Use the quadratic formula to solve the equation. -4x^2-3x+2=0 Can someone please explain

algebra
I got 14.86 yards not sure if right

algebra
A landscaper is designing a flower garden in the shape of a trapezoid. She wants the shorter base to be 3 yards greater than the height and the linger base to be 7 yards greater than the height. She wants the area to be 295 square yards. The situation is molded by the equation...

economics
can someone explain the relationship between consumer expectations and economic performance? Could use some help.

algebra
Thank you for explaining problems so that one can understand. Very much appreciated.

algebra
Rewrit the equation in vertex form. Name the vertex and y-intercept. y=3/5^2+30x+382 I need some help do not understand these type of problems.

algebra
Still confused, but I'll try another one and see if I get it. Thank you.

algebra
Solve the quadratic equation by completing the square. -3x^2+9x=1 Not sure how to do these, if someone could expplain.

algebra
The y=4.8x^2+25x+24 was correct answer, but I'm not sure how you got that.

algebra
You throw a rock off the balcony overlooking your backyard the table shows the height of the rock at different times use quadratic regressin to find a quadratic model for this data. time 0 1 2 3 4 5 height 24 44.2 54.8 55.8 47.2 29 would someone explain this to me had a ...

algebra
Not sure where I made my mistake.I lost myself after the 4a-2b+5=0, 16a+4b+5=-59. Could you please clarify what I need to do next.

algebra
What is the equation in standard form of a parabola that models the values in the table? x -2 0 4 f(x) 1 5 -59 Please help.I have somewhat of an idea a(-2)^2+b(-2)+c c=1 a(0)^2+b(0)+c= c=5 a(4)^2+b(4)+c c=-59 4a+2b+c=1 0a+0b+c=5 16a+4b+c=-59 4a-2b+5=0 16a+4b+5=-59 4a-2b+5-5=0-...

algebra
Thanks for helping I have posted two other questions if you might be able to help

algebra
what is the equation in standard form of a parabola that contain the following points? (-2,-20),(0,-4),(4,-20) Please Help

algebra
Okay thank you

algebra
Which steps transform the graph of y=x^2 to y=-2(x-2)^2+2. a) translate 2 units to the left translate down 2 units stretch by factor 2 b)translate 2 units to the right translate up 2 units stretch by the factor 2 c)reflect across the x-axis translate 2 units to the left ...

algebra
sorry was y we have to show our steps when figuring problems thank you

algebra
y=a(x-h)^2+k y=a(x+4)^2+7 8=a((x-3)+4)^2+7 8=a(1)^2+7 1=a 4=(x+4)^2+7 Is this right?

algebra
I'm not sure what your saying

algebra
Suppose a parabola has a vertex (-4,7) and also passes through the point (-3,8) Write the equation of the parabola in vertex form. f(x)=a(x-h)^2+k I believe h=-4 k=7 Not sure what to do from here.

algebra
A biologist took a count of the number of migrating waterfowl at a particular lake, and recounted the lakes population of waterfowl on each of the next six weeks. Find the function that models the data as a function of x, the number of weekx. Use the model to estimate the ...

Chem
What mass of lithium (in g) is required to react completely with 58.3 mL of N2 gas at STP?

physics
A child has a temperature of 101◦F. If her total skin area is 13 m2, find the en- ergy loss per second due to radiation, assum- ing the emissivity is 1. The Stefan-Boltzmann constant is 5.6696 × 10−8 W/m2 · K4 . (As- sume the room temperature is 70&#...

physics
A child has a temperature of 101◦F. If her total skin area is 13 m2, find the en- ergy loss per second due to radiation, assum- ing the emissivity is 1. The Stefan-Boltzmann

algebra
Could someone please explain this question to me.

algebra
You live near a bridge that goes over a river. The underside of the bridge is an arch that can be modeled with the function y=-0.000475x^2+0.851x, where x and y are in feet. How high above the river is the bridge(the top of the arch)? How long is the section of bridge above ...

algebra
Thank you.

algebra
what is the vertex form of the equation y=x^2+4x-3 Could someone please explain.

algebra
Identify the maximum or minimum value and the domain and range of the graph of the function y=2(x-3)^2-4 Can someone please help me.

algebra
Oh thank you for explaining

algebra
Identify the vertex and the axis of symmetry of the graph functio y=3(x+2)^2-3 Could someone please help me

Physical Science
Yes, based on Newton's Third Law, they both exert an equal and opposite force on each other.

english
How would you briefly describe Poe's requirement for the short story genre?

english
How would you briefly describe what the lerary movement Romanticism valued?

Geometry
If a regular pentagon has sides of four feet, what is the length from the vertex to the midpoint of the opposite side

phy101
make correction, The orbital radius of a satellite in a geosynchronous orbit is 4.2x10^7 m.)

phy101
Calculate the velocity needed for an object starting at the Earth's surface to just barely reach a satellite in a geosynchronous orbit. Ignore air drag and assume the object has a speed of zero when it reaches the satellite. (The orbital radius of a satellite in a ...

algebra
The office manager of a small office ordered 120 packs of printer paper. Based on average daily use, she knows that the paper will last about 40 days. What graph represents this situation? How many packs of printer paper should the manager expect to have after 10 days? Not ...

algebra
Can someone please try and see if you understand what I'm asking. Says to use vertcal line test to determine which graph represents a function. one line is straight up and down a complete circle(which i think) an complete line from an angle line from an angle half way and ...

algebra
center dot x=0 line up 1 to the left of y x=-2 line up to 2.5 to the left of y x=-3 line up to 4.5 to the right of y x=2 line up to 2.5 to the right of y x=3 line up to 4.5 Does this help?

algebra
above the x axis a dot on the -2 line up to 2.5, and another dot on -3 line up to 4.5, that's on left side, then right side a dot on 2 line up 2.5, and another on line 3 up to 4.5. Not sure how to figure this is someone is willing to help. possible answers; domain: {–...

Science
Two blocks (one 10kg; other 5 kg) are connected by a string that runs over the surface of a frictionless table. 1. Are the masses moving or stationary? 2. Whats the accelaration of the 10 kg mass 3. whats the acceleration of the 5 kg mass? if the string is cut when 5 kg mass ...

math
a cars tank can hold 17 gallons of gas on the freeway and i get 28 miles per gallon and i drive 32 miles whats the amount of gas in my tank

Math
58,420/25

math
Diver jump from cliff at heights of 85 to 115 feet above the water. After t seconds, a diver has fallen 16t2 feet. Does a diver jumping from a height of 85 feet reach the surface of the water within 2 seconds?

math
alex has twice as much money as jennifer. jennifer has $6 less than shannon. together they have $54. How much money does each have?

math
well, you can use the Excel to solve this question. first, you can calculate two FV. then using the result of fv 25404.31-23073.15=2331.16 so, he can pay the balloon payment and will spare $2331.16

algebra
WRITE THE SLOPE INTERCEPT FORM OF THE LINE SHOWN IN THE GRAPH. WHICH IS (5,-7)(4,7) PLEASE SHOW WORK

ALGEBRA
WRITE THE SLOPE INTERCEPT FO (5,-7)(4,7) AND SHOW WORK

ALGEBRA
GIVEN THE LINEAR EQUATION Y=4/3X+1 FIND THE Y COORDINATES OF THE POINTS (-6), (-3), AND(6). PLOT THOSE POINTS

Chemistry
X=\MX=\MX=\M What is this?

economics
a type of economic goods

Health care
Which has a greater influence on a person’s health: individual choices and actions (micro perspective) or community policies and resource availability (macro perspective)?

Chemistry
The rate constant of a particular reaction is halved when the temperature is decreased from 323 K to 273 K. Calculate the activation energy for the reaction.

history
my name was never hayden!!!!!

history
please please please please please help me mrs.sue!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! please

history
I am SOOOOOO STRESSED OUT

history
i am gonna pull my hair out one by one!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

history
i dint have any choices

history
Confucius thought that if people showed respect towards _________ they will also show respect in _________.

Physics
help!!!

Physics 121
Please do show you did it and which formula did you use. Thanks very much.

Physics 121
The pulley has an inner radius of 0.35m and an outer radius of 0.65m. It has a mass of 1.8kg. A string wrapped around the inner part of the pulley is fastened to the ceiling. A second string wrapped around the outer part of the pulley is fastened to a block. Determine the mass...

language arts
I have an assignment where it says to write a sonnet with 14 lines but they also say to have 14 syllables per line. I thought it was 10 syllables per line. Can anyone help ?

Algebra
Will you explain the concept of "i" in algebra? Problem: 4+2i/4-2i

Chemistry
Enough of a monoprotic acid is dissolved in water to produce a 0.0169 M solution. The pH of the resulting solution is 2.68. Calculate the Ka for the acid.

Chemistry help
A substance with pH of 3 is 10 times as Acidic as a substance with a pH of 4. *****or******* A substance with a pH 3 is twice as acidic as a substance with a pH of 4.

Chemistry
1. Balance the equation. 2. mols NaOH = M x L = ? 3. Convert mols NaOH to mols H2SO4. 4. M H2SO4 = moles H2SO4/L H2SO4. 5. 2 moles I believe

Chemistry
NaOH+H2SO4-> H2o+Na2SO4? How many moles of NaOH required to neutralize 1 mole H2SO4?

Chemistry
Which of the following is correct? A)A substance with pH of 3 is 10 times as Acidic as a substance with a pH of 4. B)A substance with a pH 3 is twice as acidic as a substance with a pH of 4.

Science
25 cm of 1.0 mol dm− NaOH is added to 25 cm of 1.0 mol dm− HCl. The temperature rise is 6¢XC. Which reactants will also give a temperature rise of 6¢XC? A. 25 cm of 2.0 mol dm− NaOH and 25 cm of 2.0 mol dm− HCl. B. 50 cm of 1.0 mol dm− ...

Chemistry
25 cm of 1.0 mol dm− NaOH is added to 25 cm of 1.0 mol dm− HCl. The temperature rise is 6¢XC. Which reactants will also give a temperature rise of 6¢XC? A. 25 cm of 2.0 mol dm− NaOH and 25 cm of 2.0 mol dm− HCl. B. 50 cm of 1.0 mol dm− ...

physics
I don't see the figure and the distances associated with it. So you will have to use the distances provided by your problem, but the problem can be solved using the steps below. w1= 4.92 In Static equilibrium equations: ??= 0 So… w1+w2=0; using ?= F(distance) we get ...

Chemistry
How do you convert Ounces to Grams longhand?

Statistics
A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about their attitudes. ...

math
x over 5,2x over 15,3x over 45,12 over 135 Find the value of x in the above sequence

algebra
6) Write with positive exponents: [ 3-3 a-2 b5 c-3 d-4]

algebra
6) Write with positive exponents: [ 3-3 a-2 b5 c-3 d-4]

Science/geology
Why does the Red River flow north, and the Mississippi River flow south?? I think it has something to do with elevation.. but I'm not sure.

Science/geology
@ Ms.Sue. I know the map directions have to influence on how the river flows... that's not what I'm asking.

Science/geology
Why does the Red River flow north, and the Mississippi River flow south??

math
In the annual walkathon, Lee jogs for 5 3/4 miles more than he walks. If he travelled a total of 15 miles, how many miles did he walk

Math
Find the smallest values of a and such that 32a = 23b.

science
A force of 2000N is used to push a box up an inclined plane that is 5m long. If the 100 kg box is raised to a height of 8m, how much work is done against friction? Let g equal 10 m/s2; I need to know how to set the problem up

physics
a force of 625 N is used to move an object with 1000N resistance up inclined plane of 2.0 m.What is the length of the inclined plane

physics
Calculate the height of the brain above the heart for an animal with an additional blood pressure of 498 mmHg in the heart. Use ρ = 1.057 g/cm3 for the density of blood. ???????

spanish
¡Gracias, Senora! Usted siempre es tan amable en ayudarnos.

spanish
Thank you--I am sorry for the confusion! Actually the assignment is a bit confusing as to what the end product should be. I am to summarize an actual conversation. I interviewed a friend about her plans for after she finishes school this May. Then I need to write it up but in ...

spanish
I want to write sentences about asking people questions. The questions have to do with the future, so in some sense I guess they are hypothetical. I want to know if that means that I use the (imperfect) subjunctive as hypotheticals--I think so, but I want to make sure. For ...

Math
A box contains 3 red marbles, 6 blue marbles, and 1 white marble. The marbles are selected at random, one at a time, and are not replaced. Find the probability. P(red and white) Please help me

Algebra
I know that I'm suppose to find the y, but I don't know how.

Algebra
Find the value of y so that the line passing through the two point has the given slope. (2,y) (4,5) m=5 (m=slope) how do you do this?

History
Lauren- yes she answered my first one, the questions are different if you read them carefully.

History
How did the writing/poetry influence people in the harlem renaissance?

History
Why was the harlem renaissance important for poets and writers?

college algebra
Thanks anyway, I found the answer, the -1 is to be multiplied across ALL factors including the numbers on the other side of the =. See ya

college algebra
In a radical equation if the negative symbol is in front of the radical should I use -1 to factor out the negative power? And if so do I factor across the = doing BOTH sides? Or just the side the radical is on? Thanks anyone, I've been out of school for 12 years so it is a...

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