Thursday

June 30, 2016
Total # Posts: 971

**math **

Drew was leveling a table. One corner had to be raised 3/4 inch. He had some pieces of wood 1/16 inch thick. How many pieces of wood would he need to use for the corner to make the table level?
*February 1, 2012*

**math**

The temperature outside rose 41 degrees during a 12 hour period. If the temperature rose the same number of degrees every hour, what is a good estimate of the number of degrees the temperature rose each hour?
*February 1, 2012*

**Biochemistry**

Thanks Doc!
*January 29, 2012*

**Biochemistry**

1. MES (2-(N-Morpholino)ethanesulfonic acid) is a common buffer used in biochemistry labs to stabilize proteins. The pKa for MES is 6.09. a. What is the pH of 1 liter of a 200 mM MES aqueous solution? Clue: you will need to solve a quadratic equation. (2.5 points) b. How much...
*January 29, 2012*

**Maths**

In how many places does y=4x^2-2x-5 cross the x axis?
*January 25, 2012*

**math **

Clara's pay from her paper route is based on the expression $15 + $0.10p, where p is the number of papers she delivers during the wiik. What would her weekly pay be if she deliver 315 papers each week?
*January 25, 2012*

**Math**

My son is grade 4 his homework have question is : when you multiply any number by 1,what is the product ? Please help !!!!
*January 23, 2012*

**Math**

when you multiply any number by 1,what is the product ?
*January 23, 2012*

**Maths**

solve 3^x=4^(x-2)
*January 20, 2012*

**Algebra 2**

An orange grower finds that she gets an average yield of 40 bushels per tree when she plants 20 trees on an acre of ground. Each time she adds a tree to an acre, the yield per tree decreases by 1 bushel, due to congestion. How many trees per acre should she plant for maximum ...
*January 18, 2012*

**Algebra 2**

What is the maximum product of two numbers whose sum is 22? What numbers yield this product?
*January 18, 2012*

**Algebra 2**

A rancher is fencing off a rectangular area with a fixed perimeter of 76 m. What dimensions would yield the maximum area? Find the maximum area.
*January 18, 2012*

**Algebra 2**

Consider a circle centered at (2,4). What are the coordinates of the center of the translated circle if we replace x with x-3 and y with y+5 in the equation of the circle?
*January 15, 2012*

**math**

Give each letter of the alphabet a money value: A= 1 penny, B= 2 penny, C= 3 penny,and so on.Find words worth 1/5 dollar, 9/10 dollar, 1 1/20 dollars, and 1 1/2 dollars.
*January 15, 2012*

**math**

Give each letter of the alphabet a money value: A=1c, B=2c, C=3c,and so on.Find words worth 1/5 dollar, 9/10 dollar, 1 1/20 dollars, and 1 1/2 dollars.
*January 15, 2012*

**Algebra 2**

Find the equation of the parabola that goes through the given points. (1,2) (0,5) (-1,14)
*January 14, 2012*

**Algebra 2**

The perimeter of a rectangle RSTV is 44 ft. Find the least value of the diagonal RT.
*January 14, 2012*

**math**

A soccer game started at 11:10 a.m. and lasted 1 1/2 hours. About what time did the game end? (A) 12:30p.m. (B) 1:30p.m. (C) 12:00a.m. (D) 1:00a.m.
*December 21, 2011*

**math**

Find digits A and B in the number below so the folling condition are true. The 5-digit number must be divisible by 4. The 5-digit number must be divisible by 9. Digit A cannot be the same as Digit B. 12A3B Explain the steps you followed to solve the problem.
*December 21, 2011*

**Math 30 pure**

why thank you!
*December 20, 2011*

**Math 30 pure**

simplify: (x+y)^10 simplify: (2a+5)^5
*December 20, 2011*

**English**

what are 4 main disadvantages of visiting other countries?
*December 17, 2011*

**Biology**

I go with B. It makes more sense that way. DNA never leaves a cell only messenger RNA does.
*December 11, 2011*

**math**

suppose you deposited $3000 of earned income into an IRA, you can earn an annual interest rate of 8%and you are in a 40% tax bracket (Note:interest rates and tax brackets are subject to change over time, but some assumptions must be made to evaluate the investment) Also, ...
*December 11, 2011*

**maths**

find the distance in kilometers traveled by an areoplane moving at 150km/h for 50minutes.
*December 11, 2011*

**english**

Thank you Writeacher.
*December 10, 2011*

**english**

I have to find three or four nouns, adjectives, adverbs and verbs from a book. Please can you tell me if I am right? noun - Stanley, lizard, toothbrush. adjectives - sweet, fresh onions. The answer sweet,fresh. He suddenly realised where he'd seen the gold tube before. The...
*December 10, 2011*

**math**

A certain kind of bacteria doubles in quantity every hour. At midnight two nights ago. only two of these bacteria were in a jar. At midnight last night, the jar was full. At what time was the jar half full?
*December 9, 2011*

**science**

My question is ' what do you think if we lived in a world without any plants?' I have tried typing this in a search engine and it came up with nothing. Please could you help give me a website. Thank you.
*December 8, 2011*

**college physics**

I don't know where to begin with this question. Could someone help me please? A rod of mass 4.1 kg and length 1.6 m hangs from a hinge as shown in the figure below. The end of the rod is then given a "kick" so that it is moving at a speed of 5 m/s. How high will ...
*December 2, 2011*

**math**

(1A) Write the 11-digit number that has a 2 in the ones place,1 in the tens place,a digit in the ten-thousands place that is twice the digit in the ones place,the smallest odd digit in the billions place, 6 in the tenths place, and 0 in all the other places. (1B) How did you ...
*November 30, 2011*

**3 grade math**

12+6=18
*November 30, 2011*

**Algebra 2**

Show that for any complex number z, |z| = |-z|. (Hint: Let z = a + bi.)
*November 30, 2011*

**math**

ben has finished homewok during holiday.he does 2/3 of remaining question each days. after 4 days, 4 question are left .how many question he all together to do ?
*November 27, 2011*

**Physics**

A ball, of mass 0.3Kg, is held on the inside of a smooth hemispherical bowl at a height 0.15 m above the base. It is then released. Assuming there is no friction, the acceleration due to gravity, g, is 10 m/s2 and the potential energy is zero at the base of the bowl - What is ...
*November 22, 2011*

**Math61**

R is bounded by Y=2x-x^2 and the x-axis. Find the centroid of R. Sketch the region.
*November 16, 2011*

**physics**

Two forces, 422 N at 24 and 278 N at 29 are applied to a car in an effort to accelerate it. mass of the car is 3000kg Find the resultant of these two forces. Answer in units of N Find the direction of the resultant force (in relation to forward, with counterclock- ...
*November 12, 2011*

**Biology**

Which functional group is most likely to be responsible for an organic molecule behaving as a base (-OH donator / H+ acceptor)? A. Phosphate B. Amino C. Hydroxyl D. Carbonyl E. Carboxyl
*November 6, 2011*

**Biology**

If a protein's primary structure is predetermined or directed by a "source." what might this "source" be?
*November 6, 2011*

**Biology**

There are 20 amino acids that cells use to build the numerous amounts of proteins that are essential for life. If a protein molecule consisted of 100 amino acids, how many combinations are possible? What is the probability that out of the total possible combinations of the 100...
*November 6, 2011*

**event driven programming**

8. Write a visual basic program that accepts basic pay, allowances and tax of ten employees computes gross pay and net pay of each of the employee.
*November 2, 2011*

**Algebra 2**

When x² - 3x + 2k is divided by x + 2, the remainder is 7. Find the value of k. Use synthetic division to do so.
*October 28, 2011*

**math**

Joel and jacob are brothers. This year both of their ages are prime numbers. Last year both of their ages were composite numbers.Both of their ages will be composite numbers again over the next three years. If joel and jacob are both teenagers, how old are they now?
*October 27, 2011*

**Algebra 2 **

When two rational expressions are divide, the quotient is 5x² + 3x + 12 + 7/(x + 5. What are the two polynomials?
*October 27, 2011*

**Algebra 2**

Please use the long division method for this problem.
*October 27, 2011*

**Algebra 2**

(4a³b + 5a²b² + a⁴ + 2ab³)÷ (a² + 2b² + 3ab)
*October 27, 2011*

**Science (urgent)**

Assuming you meant an arrow instead of a "Reserved" sign, it should be B, Product. The substrate is something being acted upon in a reaction (I'm assuming this is for a biology/biochemistry class, so in that case the substrate is what's being acted on by the ...
*October 26, 2011*

**physics**

I'm assuming you're referring to kinetic friction here, in either case (static or kinetic friction) however the following method is able to find the answer. Friction=mass*g*friction constant In this case the force of friction is equal and opposite to 20N, so Friction...
*October 26, 2011*

**physics**

Acceleration is equal to change in velocity over time. In this case the velocity is constant, so the change is 0. 0 divided by anything is 0, so there is no acceleration (a=0 /s^2)
*October 26, 2011*

**Physics**

You just need to calculate Jane's kinectic energy before she grabs the vine (.5mv^2). This will be equal to her gravitational potential energy (mg*height) at the top of her swing. .5mv^2=mgh -cancel the mass on both sides .5v^2=gh 19.22=9.8h h=1.96
*October 24, 2011*

**physics**

objects of masses m1=4 kg and m2=9kg are connected by a light string that passes over a frictionless pulley. the object m1 is held at rest on the floor and m2 rests on a fixed incline of delta=40 degrees. the objects are released from rest and m2 slids 1.00 m down the ...
*October 23, 2011*

**physics**

A falling skydiver has a mass of 123 kg. (a) What is the magnitude of the skydiver's acceleration when the upward force of air resistance has a magnitude that is equal to one-fourth of his weight? 7.35 m/s^2 (b) After the parachute opens, the skydiver descends at a ...
*October 21, 2011*

**Physics**

A box is sliding up an incline that makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30 m/s. How far does the ...
*October 21, 2011*

**Algebra 2**

Factor. -16 + 17(5-y²)-(5-y²)² and [x + y + 1][x² - x(y + 1)+(y + 1)²
*October 20, 2011*

**Algebra 2**

Factor. (y-1)⁴ - (y-1)²
*October 20, 2011*

**Algebra 2**

Factor.
*October 20, 2011*

**Algebra 2**

1/16(x)^3a + 1/2(y)^(6a)(z)^(9b)
*October 20, 2011*

**Algebra 2**

Factor. 2x⁴ + x³ + 2x² + 4x - 24
*October 20, 2011*

**Algebra 2**

Solve for x. x³ + ax² - a²x - a³ = 0
*October 18, 2011*

**Algebra 2**

Solve for x. 2x² - 5bx + 4cx - 10bc = 0
*October 18, 2011*

**simple math**

1:3 and 1:2 Which one is a larger ratio? What does it mean for a ratio to be larger or smaller? Thank you.
*October 18, 2011*

**English**

Can anyone check this text and if there are any mistakes, fix it? I am writing to complain about the advertisement for your new game. I just played the game and then i realised that the advertisement is misleading. You say there are big cash prizes and averyone can win it. In ...
*October 16, 2011*

**physics**

can i get thé answer please
*October 12, 2011*

**math**

a kid with a baseball cap is playing catch with himself by trowing a ball straight up how fastdoes he throw the ball if it comes back to his cap in0.8 seconds later
*October 9, 2011*

**Statistics**

Calculate the mean and standard deviation of the probability distribution created by rolling a dice. Either show work or explain how your answer was calculated.
*October 9, 2011*

**Algebra 2 (Diophantine Equations)**

Solve 5x + 12y = 47 using Diophantine equations.
*October 7, 2011*

**math**

A pie plate measures 8 inches across the bottom. What is the area of the bottom of this pie plate?
*October 6, 2011*

**Algebra 2 (Linear Diophantine Equation) **

31x + 8y = 180
*October 6, 2011*

**Algebra 2 (Diophantine Equation)**

7x + 16y = 225 Solve using Diophantine equations.
*October 6, 2011*

**Algebra 2 (Diophantine Equations)**

Find all positive integer solutions for 13x + 9y = 190 using Diophantine equations.
*October 5, 2011*

**Algebra 2 **

At a county fair, adults' tickets sold for $5.50, senior citizens' tickets for $4.00, and children's tickets for $1.50. On the opening day, the number of children's and senior's tickets sold was 30 more than half of the number of adults' tickets sold. ...
*October 5, 2011*

**Algebra 2 **

At a county fair, adults' tickets sold for $5.50, senior citizens' tickets for $4.00, and children's tickets for $1.50. On the opening day, the number of children's and senior's tickets sold was 30 more than half of the number of adults' tickets sold. ...
*October 5, 2011*

**Algebra 2 (Linear Programming)**

Part A requires 4 hours per unit on a lathe and 3 hours per unit on a milling machine. Part B requires 2 hours per unit on a lathe and 5 hours per unit on a milling machine. 52 hours are available on the lathe and 60 hours are available on the milling machine. If the profit ...
*October 5, 2011*

**Algebra 2 (Distance Problem)**

A train leaves Union Station for Central Station, 216 km away, at 9 A.M. One hour later, a train leaves Central Station for Union Station. They meet at noon. If the second train had started at 9 A.M., and the first train at 10:30 A.M., they would still have met at noon. Find ...
*October 5, 2011*

**math**

decimal number patterns rules 4.8, 9.6, 8.9, 17.8, 17.1
*October 4, 2011*

**Algebra 2 (Linear Programming)**

A bicycle builder makes two models. The basic model requires 2 hours of frame construction, 4 hours of assembly, and 1 hour of finishing. The deluxe model requires 3 hours of frame construction, 3 hours of assembly, and 2 hours of finishing. Each day 36 hours are available for...
*October 4, 2011*

**Algebra 2 (Linear Programming)**

The Carbon coal company has 2 mines, a surface mine ad a deep mine. it costs $200 per day to operate the surface mine and $250 to operate the deep mine. Each mine produces a medium grade and a medium-hard grade coal, but in different proportions. This surface mine produces 12 ...
*October 4, 2011*

**Algebra 2 (Linear Programming)**

An airline will provide accommodations for a minimum of 2000 first-class, 1500 tourist, and 2400 economy-class passengers. Airplane P-1 costs $12,000 per miles to operate and can accommodate 40 first-class, 40 tourist, and 12 economy-class passengers. Airplane Q-2 costs $10,...
*October 4, 2011*

**Algebra 2**

A bicycle builder makes two models. The basic model requires 2 hours of frame construction, 4 hours of assembly, and 1 hour of finishing. The deluxe model requires 3 hours of frame construction, 3 hours of assembly, and 2 hours of finishing. Each day 36 hours are available for...
*October 4, 2011*

**Algebra 2**

Is this system of equations inconsistent? Is it dependent? x = 3y + 4 6y = 2x - 6
*October 3, 2011*

**math**

If it is the whole entire top over 2 then its different. -> Multiply by 1/2, which will cancel out the denominator. Then it will leave you with: 9x + 6 - 4x = 8 5x + 6 = 8 5x = 2 x = 2/5
*October 3, 2011*

**math**

* Multiply 2 with 8 to get rid of the 2. 9x + 6 - 4x = 16 5x + 6 = 16 - 6 = -6 _________________ 5x = 10 x = 2
*October 3, 2011*

**Algebra 2**

Solve using linear combinations. x - 5y = 6 3x + 4y = 18 What are linear combinations?
*October 3, 2011*

**math**

"I think we can say that the father is 24 years older than John, regardless of how old they are. If J represents John's age now, then 3J represents John's father's age. This is equal to J+24, so we set an equation 3J = J + 24 2J = 24 J = 12, 3J = 36 John is 12...
*October 2, 2011*

**Algebra 2**

Shouldn't it have 4 points due to 4 vertices?
*October 2, 2011*

**Algebra 2**

Find the coordinates of any vertices formed. 3x + 4y ≥ 12, 5x + 6y ≤ 30, and 1 ≤ x ≤ 3. I tried graphing this, which formed a parallelogram, but it was hard to find eyeball vertices.
*October 2, 2011*

**Algebra 2**

How many set solutions are there for this problem 33x + 103y = 6526? The solution cannot contain negative integers or decimals and fractions.
*September 30, 2011*

**math**

This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and if ...
*September 30, 2011*

**Diophantine Equations (Algebra 2)**

A box contains two sizes of bolts. The small size weighs 33 grams. The large size weighs 103 grams. The total weight of the bolts is 6526 grams. How many of each size are there? Can you write and solve it with Diophantine Equations.
*September 30, 2011*

**English**

"The Scarlet Ibis" interpretive essay help. Directions: James Hurst, the author, makes the observation that "pride is a wonderful, terrible ting, a seed that bears two vines, life and death." These words are central to the meaning of the story. The phrase ...
*September 30, 2011*

**Math**

i think 82 is the answer.
*September 30, 2011*

**Algebra 2**

The tens digit of a two-digit positive integer is 2 more than three times the ones digit. If the digits are interchanged, the new number 13 less than half the given number. Find the given integer. (Hint: Let x = tens-place digit and y = ones-place digit, then 10x + y is the ...
*September 30, 2011*

**math**

Tony and Tom are brothers.This year both of their ages are prime numbers. Last year both of their ages were composite numbers. Both of their ages will be composite numbers again over the next three years. If Tony and Tom are both teenagers, how old are they now?
*September 29, 2011*

**math/science**

this is the only information we have been given. hope someone can help.
*September 29, 2011*

**math/science**

Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
*September 29, 2011*

**biology**

Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
*September 28, 2011*

**physics**

A diver leaves the board traveling at 3.5 m/s at an angle of 75º with respect to the horizontal. What is her speed when she hits the water, 3 meters below?
*September 27, 2011*

**math**

A cube measures 2 meters on each side. What is the volume of the cube?
*September 25, 2011*

**chemistry**

C2H6 + O2 = CO2 +H2O + Energy
*September 12, 2011*

**Math**

simplify (8 – i) – (4 – i) using Complex Numbers
*September 7, 2011*