Friday

April 29, 2016
Total # Posts: 456

**Math (Elementary Algebra)**

What is the value of the expression 2x^2 + 3xy - 4y^2 when x = 2 and y = -4 ? Please help this is for my accuplacer. If you could show your work explaining how you got the answer that would be awesome. Thank you in advance
*April 18, 2016*

**Elementary Statistics**

I just need the second question, I discovered the first answer iis 72.88%
*April 16, 2016*

**Elementary Statistics**

SAT math test scores for all students taking the test are approximately normally distributed with mean score of 514 and std. deviation of 118. What is the probability that a randomly chosen student will earn a score above 600 on their SAT math test? There's 19 students, ...
*April 16, 2016*

**algebra**

Goran invested his savings in two investment funds. The amount he invested in fund A was$2000 less than the amount he invested in fund B. Fund A returned a 3% profit and fund B returned a 2% profit. How much did he invest in fund A, if the total profit from the two funds ...
*April 5, 2016*

**algebra**

Two cars leave town 150 kilometres apart at the same time and travel toward each other. One car's rate is 18 kilometres per hour more than the others. If they meet in 3 hours, what is the rate of the faster car ?
*April 5, 2016*

**math**

We consider the non-homogeneous problem {y''-16y} = {256x^{2}} First we consider the homogeneous problem {y''-16y} = 0 : 1) the auxiliary equation is a r^2+br+c = =0 . ________________ 2) The roots of the auxiliary equation are (enter answers as a comma ...
*April 2, 2016*

**Math**

The scale drawing to the right shows the first floor. The actual dimensions of the garage are 20 ft by 25 ft. ( Scale is 1 by 1 1/4) . How many ft does each inch represent? The whole thing is a little confusing, any tips however?
*March 31, 2016*

**Math**

find the derivative of x^3-6x^2+15x+8 and show by completing the square that function has no turning point. I can find derivative but not sure of next step
*March 8, 2016*

**Math**

What is the simplified form of this expression? m^9t^-10/m^-4t^-5 m^13/t^15 m^5t^5 m^13/t^5 m^-13t^-15 I think it's the third, but I'm not sure if that's correct. I would appreciate if someone could show me how to solve it if it's incorrect.
*February 10, 2016*

**Math**

What is the simplified form of this expression? m^9t^-10/m^-4t^-5 m^13/t^15 m^5t^5 m^13/t^5 m^-13t^-15 I think it's the third, but I'm not sure if that's correct. I would appreciate if someone could show me how to solve it if it's incorrect.
*February 9, 2016*

**Math**

How can I show 1/3x+10=3/5x as or in a real world problem??
*February 8, 2016*

**Math**

What is the final price of a textbook that costs $107.20 with an added tax rate of 6%?
*February 5, 2016*

**math**

Charles work a total of 30 hours last week. he worked 10 hours on Monday. what fraction of his work hours for the week did he complete on Monday?
*January 20, 2016*

**Physics**

The Earth exerts an 640 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N.
*January 13, 2016*

**English(Poetry)**

What is prose paraphrase, and how do you do it to a poem?
*January 11, 2016*

**Physics**

Never mind I got it
*January 7, 2016*

**Physics**

A 31.9 N object is in free fall. What is the magnitude of the net force which acts on the object? Answer in units of N.
*January 7, 2016*

**Precalculus**

Given cosθ=3/7 and 0≤θ≤π/2 find sinθ and tanθ
*January 7, 2016*

**Math**

Consider a large water tank: If 3900L occupies 3/4 of the total capacity of the tank, how much water will the tank hold when it is full?
*December 13, 2015*

**Math**

She has one board that is 3m7cm long and another board that is 3m 91cm find the total length of he two boards in meters
*November 23, 2015*

**English 10 A**

alright
*October 22, 2015*

**English 10 A**

Its a practice quiz
*October 22, 2015*

**English 10 A**

4.All of the following lines from "Alone." contain examples of alliteration except.. A-"like a boy in a playground surrounded by enemies" B-"and scuttled smartly right over the road" C-"then-stillness. I sat back in my seat-belt" D-"...
*October 22, 2015*

**English 10 A**

that is why i asked for help im just wondering if anyone has a good understanding on this quiz im not asking for the answers
*October 22, 2015*

**English 10 A **

Has anyone took the "alone, The nobel prize , First Frost" quiz? if so please help thank you so much!! i will try to help in return.
*October 22, 2015*

**math**

The volume V of a pyramid varies jointly as its height h and the area of its base B . Given that the volume of the pyramid is 60 cubic inches when the height is 5 inches and area of its base is 36 square inches, what is the area of the base if its volume is doubled and the ...
*October 19, 2015*

**Algebra**

What's the answer ?
*October 7, 2015*

**English for Academic purposes**

What are the main reasons for a wave of discontent
*September 13, 2015*

**life orientation**

can protest need permit
*May 31, 2015*

**Math (Solving Equations) **

Find all solutions (answers should be given in simplified form). Some answers may involve the number i. *I will use lowercase l to represent absolute value lines.* 3 lx-1l + 4 = 19 We've never really worked with absolute value in solving equations before. Do I distribute ...
*May 17, 2015*

**Math (Solving Equations)**

Sorry, the final line should read: x(x-4) / 6 = (x+6)/2
*May 17, 2015*

**Math (Solving Equations) **

Find all solutions (answers should be given in simplified form). Some answers may involve the number i. (x^2/6) - (2x/3) = 3 + (x/2) I turned (2x/3) into (4x/6) and subtracted it from (x^2/6) to get: x(x-4) / 6 I turned 3 into 6/2 and added it to (x/2) to get: (x+6) / 2 So ...
*May 17, 2015*

**Physics**

Never mind, I have solved it. :)
*May 15, 2015*

**Physics**

I am not sure which equation I would use to solve this problem.
*May 15, 2015*

**Physics**

A pendulum with a length of 1.25m has a period of 2.2s. What is the value of g?
*May 15, 2015*

**Chemistry - Acids/Bases**

Thank you so much for a detailed explanation! I understand partially what you're saying, and I'll clarify with my teacher as to how much I need to understand.
*May 9, 2015*

**Chemistry - Acids/Bases **

What kinds of compounds are typically strong bases? (More than one may apply.) *hydroxides of group IIIA (13) metals *conjugate bases of strong acids *hydroxides of group IA (1) metals *hydroxides of transition metals *hydroxides of group IIA (2) metals All I know about strong...
*May 9, 2015*

**math**

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean? A. The improvement was due to the fact that there were more weeds in one ...
*April 16, 2015*

**statistics**

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean? A. The improvement was due to the fact that there were more weeds in one ...
*April 16, 2015*

**Language arts**

are you serious can you not just see what rhymes its not hard, literally a 5 year old could do that, and this is 8th grade L.A
*February 25, 2015*

**art**

yeah im also in florida virtual school lol, allot of people here are from connexus
*February 12, 2015*

**Geometry**

Four friends order a 12 inch diameter pizza to share equally. how much pizza does each receive?
*February 6, 2015*

**Art**

My test says b
*January 27, 2015*

**science**

A ball is thrown upward from the ground with an initial speed of 16.0 m/s; at the same instant, another ball is dropped from a building 12 m high. After how long will the balls be at the same height above the ground?
*January 22, 2015*

**physics**

An athlete leaves one end of a pool of length L at t = 0 and arrives at the other end at time t1. She swims back and arrives at the starting position at time t2. If she is swimming initially in the positive x direction, determine her average velocities symbolically in the ...
*January 22, 2015*

**physics**

A person walks first at a constant speed of 5.10 m/s along a straight line from point circled A to point circled B and then back along the line from circled B to circled A at a constant speed of 3.15 m/s.(a) What is her average speed over the entire trip? How can I find the ...
*January 21, 2015*

**english**

How do I fix this sentence to create parallel structure? The university is one of the largest employers in the community, bring in substantial business, and the cultural impact is also big.
*January 18, 2015*

**social studies**

1) b 2) a 3) c @Ms.Sue?
*January 7, 2015*

**social studies**

@Ms.Sue?
*January 7, 2015*

**social studies**

1) a 2) a or d 3) b
*January 7, 2015*

**social studies**

1)An interest rate is a special type of? a. loan b. price c. bank d. service 2) How does a compound interest rate differ from a simple interest rate? a. Compound interest rates pay more interest over time b. Compound interest rates are calculated only once a year c. Compound ...
*January 7, 2015*

**Vocabulary **

Can you use the following words in a sentence Infirmity Implication Infringe Succinct Sparse Innovation Revitalize Subjective Inequity Deterrent
*December 4, 2014*

**physics**

with what speed does a hammer dropped from a height of 23 m strike the ground?
*November 30, 2014*

**physics**

A robot arm expends 15J of work to extend a spring 10cm from its equilibrium position. How much force is required?
*November 30, 2014*

**physics**

How much work is required to extend an exercise spring 15cm if the spring constant is 800N/m?
*November 30, 2014*

**physics**

A 75 kg pilot flies a plane in a vertical loop. At the top of the loop, when the plane is completely upside-down for an instant, the pilot hangs freely in the seat and does not push against the seat belt or seat. The airspeed indicator reads 120 m/s. What is the radius of the ...
*November 20, 2014*

**Art**

1. D my bad..
*November 3, 2014*

**Calculus**

find the intervals on which f(x) is increasing and decreasing along with the local extrema. f(x)=x^4 + 18x^2 I took the derivative and got: f'(x)= 4x^3 + 36x When I set this to zero, I get the imaginary number 3i. I can't get test values for an imaginary numbers, so I ...
*November 3, 2014*

**Math**

The pressure, P (in lbs/ft2), in a pipe varies over time. Three times an hour, the pressure oscillates from a low of 88 to a high of 254 and then back to a low of 88. The pressure at t=0 is 88. Find a possible cosine formula for P=f(t), where t is time in minutes.
*November 2, 2014*

**Bio AP**

Where does a g-protein bind to a receptor cell and what is it's function?
*October 30, 2014*

**math**

An ostrich farmer wants to enclose a rectangular area and then divide it into 4 pens with fencing parallel to one side of the rectangle. There are 720 feet of fencing available to complete the job. What is the largest possible total area of the 4 pens?
*October 28, 2014*

**math**

Find the critical numbers of the function f(x) = x^{1/4}-x^{-3/4}.
*October 25, 2014*

**math**

Find the critical numbers for f=5+10x-x^{2} in the interval [-3,3].Also find the minimum and maximum.
*October 20, 2014*

**Science (Physics)**

I need help with these. I'm so confused! Thanks! 1.) An F-14 Tomcat fighter jet goes from rest to a speed of 75m/s in 2.5 s. What is the acceleration? 2.) Preston tossed a red ball upward and it reaches a maximum height of 3.0m What is the final velocity when it returns to...
*October 16, 2014*

**Math**

32x+36y+16=0 36x+32y+16=0 Find x and y
*October 15, 2014*

**please check my english**

It's D B B D A D I just took it and I got a 4/6 >:( so Those are the correct answers ^^
*October 13, 2014*

**Math**

A projectile is shot upward from the earth with an initial velocity of 320 ft/sec. (a) What is the velocity after 5 secs.? ft/sec. (b) What is the acceleration after 3 secs.? ft/sec^2.
*October 7, 2014*

**Math**

For this problem, a person standing on the edge of a cliff throws a rock directly upward. it is observed that 2 secs later the rock is at its maximum height (in feet) and that 5 secs after that (meaning 7 seconds after being thrown) the rock hits the ground at the base of the ...
*October 7, 2014*

**Math**

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t) = 48+80t-16t^2 What is the velocity of the ball when it hits the ground?
*October 7, 2014*

**Math**

Assume that f is a continuous function from the real numbers to the real numbers such that for all numbers x,y, and a it is true that f(x+y)=f(x) + f(y) and that f(ax)=af(x). Further assume that f(1) = pi. Find f'(-1). Please explain your reasoning. I am so confused. Ive ...
*October 6, 2014*

**Math**

A street light is at the top of a 17 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft from the base of the pole? Must be accurate to fifth decimal place. I have ...
*October 5, 2014*

**Math**

WebWorks will not take the answer.
*October 5, 2014*

**Math**

A spherical balloon is to be deflated so that its radius decreases at a constant rate of 12 cm/min. At what rate must air be removed when the radius is 5 cm? Must be accurate to the 5th decimal place. It seems like an easy question but no matter how many times i attempt it I ...
*October 5, 2014*

**Math**

Water is leaking out of an inverted conical tank at a rate of 0.0109 {\rm m}^3{\rm /min}. At the same time water is being pumped into the tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4.5 meters. If the water level is rising at a rate of ...
*October 5, 2014*

**Chemistry**

I'm really confused about how to do these two problems. Please help me. What is the amount of heat (kJ) required if 64.0 kg of H2O is heated from 25°C to 85°C? 200.0 g Al (C = 0.900 J/g × °C) at 95°C is added to 85.4 g H2O at 25°C. What is the ...
*September 25, 2014*

**health**

Visiting your doctor for regular check-ups is an example of which step you might take to meet take to meet your health goals? A. gain awareness. (B). gain knowledge. C. build health skill. D. set goals.
*September 10, 2014*

**Grammar **

Many stories about the first Valentine's Day exist.. What is the simple subject?
*September 3, 2014*

**Grammar**

Valentines Day
*September 3, 2014*

**Grammar**

Valentines Day has an interesting history? What is the simple subject?
*September 3, 2014*

**reading**

because i am writing a poem and i need a different word
*August 19, 2014*

**reading**

what is another word for things?
*August 19, 2014*

**science**

thanks
*August 19, 2014*

**science**

oh ok sorry did not see that
*August 19, 2014*

**science**

please someone help
*August 19, 2014*

**science**

can you please help me find 3 good science experiment? for the science fair....
*August 19, 2014*

**Social Studies**

thank you so so so much...
*August 18, 2014*

**Social Studies**

???? please answer i need to finish my hw
*August 18, 2014*

**Social Studies**

ya what were the years
*August 18, 2014*

**Social Studies**

please can someone help me
*August 18, 2014*

**Social Studies**

what year were england and romans invaded?
*August 18, 2014*

**math**

Finance charge was 5.58 on a monthly balance of 318.76. What is the rate?
*August 13, 2014*

**college chem**

You are instructed to create 400. mL of a 0.40 M phosphate buffer with a pH of 6.9. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l) equilibrium reaction arrow ...
*June 23, 2014*

**Physics**

a 40kg girl and a 30kg boy face each other on friction free roller skates. the boy pushes the girl,
*May 19, 2014*

**chemistry**

The complete combustion of propane, C3H8(g), is represented by the equation: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) ΔH° = -2220 kJ How much&...
*May 14, 2014*

**MATHHH**

You are literally a life saver, thank you so so so so so so much!!
*May 11, 2014*

**MATHHH**

A hockey game is preparing for a group photo. The team has 1 goalie, 4 defense, and 7 forwards. The photographer wants two rows of six players. How many ways can the team arrange six players in the front row with at most 2 defense?
*May 11, 2014*

**MATHHH**

A conveyor belt sushi restaurant lets you choose what you want to eat from variously-coloured plates that go by. You pay based on the colours of the plates. After dinner, 1 green plate, 4 yellow plates, and 2 blue plates. Use the Fundamental Counting Principle to count how ...
*May 10, 2014*

**MATHHH**

A paper bag contains a mixture of three types of treats: 12 granola bars, 10 fruit bars, and 8 cheese strips. Suppose that you play a game in which a treat is randomly taken from the bag and replaced, and then a second treat is drawn from the bag. You are allowed to keep the ...
*May 10, 2014*

**Math 12**

In Lotto 649, find the probability that: a) You have all six correct numbers. b) You have three correct numbers.
*May 7, 2014*