Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 2,968

**math**

9*12=108 W+(w+44)=108 2w=64 W=32. -white roses

**math**

X+y=54 5x+20y=780 -5(x+y=54) -5x-5y=-270 5x+20y=780 15y=510 Y=34 X=20 5(20)+20(34)=780 Five dollars bills = 20

**Algebra 1- Math**

2x-3y =-3 -1(3x-3y=18) 2x-3y=-3 + -3x+3y=-18 (add two equations) -x = -21 x = 21 2(21)-3y =-3 42-3y=-3 -3y=-45 y=15

**math**

A man sells a nut mixture consisting of 1/3 pecans and 2/3 cashews. Pecans cost 3 times as much as cashews. if a pund of the mixture costs him $0.40, how much did he pay for a pond of cashews? a pound of pecans?

**Physics**

In a baseball a pitcher can accelerate a .15kg ball from rest to 98 mi/h in a distance of 1.7m a) what is the average force exerted on a ball during a pitch? b)If the mass of the ball is increased, is the force required of the pitcher increased, decreased or unchanged?

**MATH**

7s-5s+10<30 -10 -10 7s-5s < 20 2s < 20 \2. \2 S. < 10

**Math**

Tom spent 1/3 of his allowance at mall. Of the money he spent at the mall, he spent 3/5 of it on jeans. What fractions of his allowance did Tom spend on jeans?

**Algebra**

W(w+4)=77 W^2 + 4w - 77 = 0 (W-7)(w+11)=0 W-7=0 W=7 W+11=0 gives neg. ans. Length = 7+4=11 Width = 4

**physics**

a mass m=8 kg sits on top of an h=1.8 m high table. The angle of the ramp is theta= 35 degrees. What is the length of the ramp.

**Reading( Immediate)**

Thanks

**Reading( Immediate)**

Do you have a copy of the sentence check 2 questions for chapter 20 in the 4th edition of Improving Vocabulary Skill book by Sherrie L. Nist?

**CHem Help!!!!**

What Celsius temperature will the Fahrenheit thermometer be 4-times more than on the Celsius thermometer?

**Chem Help!!!!**

I just need a solution to the first half of the question I figured out the 2nd half

**Chem Help!!!!**

What Celsius temperature will the Fahrenheit thermometer be 4-times more than on the Celsius thermometer? At what Celsius temperature will the numerical reading on the Fahrenheit thermometer be 1/9 that on the Celsius thermometer?

**Chem Help!!**

thank you

**Chem Help!!**

A standard 1.000kg- mass is to be cut from a bar of steel having an equilateral triangular cross section with sides equal to 3.00in. The density of the steel is 7.70g/cm^3. How many inches long must the section of bar be?

**Chem Help!!**

ok cool thanks for your help

**Chem Help!!**

After I multiplied by 2 I got a final answer of 0.000556mm

**Chem Help!!**

When I converted with Devron method I got 27.8*10^-6mm When I did it Bob's way I got 27.8*10^-5 is this correct?

**Chem Help!!**

The volume of a red blood cell is about 90.0*10^-12cm^3 Assuming that the red blood cells are spherical, what is the diameter of a red blood cell in millimeters?

**Chemistry**

thank you

**Chemistry**

20.02cm*

**Chemistry**

The density of aluminum is 2.70 g/cm^3. A square piece of aluminum foil, 20.02 on a side is found to weigh 2.573g. What is the thickness of the foil, in millimeters?

**Chemistry**

when I was copying and pasting the problem the units and numbers did not transfer... I completely understand that you need these units

**Chemistry**

The density of aluminum is . A square piece of aluminum foil, 20.02 on a side is found to weigh 2.573 .What is the thickness of the foil, in millimeters?

**Chemistry**

1.006 g/ml 4.7% acetic acid by mass 3.00L

**Chemistry**

A vinegar sample is found to have a density of 1.006 and to contain 4.7 acetic acid by mass.How many grams of acetic acid are present in 3.00 of this vinegar?

**Chemistry**

Hey I tried that and still cant get the right answer. The answer that I got is 555.6 or 556 K and its not correct. What answer did you get?

**Chemistry**

At what temperature will the rate constant for the reaction have the value 6.5×10−3 M/s? (Assume k = 5.4 * 10^-4 M/s-1 at 599K and k = 2.8 * 10^-2 M/s at 683K .)

**Chemistry**

I am trying to determine which protein (in a given list) will stick most tightly to a cation exchange column at pH 7. I am unsure how to go about solving this.. We are given molecular weight, isoelectic point, and number of subunits for each protein. Where should I begin?

**Chemistry**

I am trying to determine which protein (in a given list) will stick most tightly to a cation exchange column at pH 7. I am unsure how to go about solving this.. We are given molecular weight, isoelectic point, and number of subunits for each protein. Where should I begin?

**goven**

Which one of the following is NOT widely regarded as a political ideal in America?

**Intermediate reading**

In questions 3 and 4 would the correct answer be: 3 prone , flippant 4. perception, impasse

**Intermediate reading**

Is question 3 and 4 correct

**Intermediate reading**

3.impasse, flippant 4. prone, perception

**Intermediate reading**

word choices: congenial, prone, flippant,rapport, impasse, rationale, perception, relentless, prompt, reprisal 1.Because Wade is so congenial and easy to talk to, we established a warm rapport the first day we met. 2. Although the company president explained rationale behind t...

**Intermediate reading**

Can you help me with the sentence check 2 Chapter 17 and 18 in the improving vocabulary skill workbook?

**math**

you fill up 40 gallon pool putting in 2 gallons water every minute, if someone scoops out 1 gallon every 8 minutes, how long would it take to fill the pool?

**science**

When you hit a nail into a board using a hammer, the head of the nail gets warm. In terms of kietic and thermal energy, describe why you think this happens.

**calculus**

Let f(x)=(2+x)2−4x. Note that f(x) is undefined at x=0. However, in this case, we can find a continuous function g(x) defined at x=0 that agrees with f(x) near x=0. Find the function g(x) that is equal to f(x) when x≠0 such that g(0)=limx→0f(x).

**calculus**

Let f(x)=x2+x−6x−2. Note that f(x) is undefined at x=2. However, in this case, we can find a continuous function g(x) defined at x=2 that agrees with f(x) near x=2. Find the function g(x) that is equal to f(x) when x≠2 such that g(2)=limx→2f(x).

**math**

A pattern for curtains calls for 2/3 of a yard of material. You want to shorten the curtains to2/3 of the height of the pattern. How much fabric is needed?

**Calculus**

Use a trig identity to combine two functions into one so you can solve for x. (The solution should be valid for any value of t). 3cos(t) + 3*sqrt(3)*sin(t)=6cos(t-x) I know that 6 cos(t-x) can be 6(cos(t)cosx(x)+sin(t)sin(x)) I dont know where to go from there though.

**Calculus**

In these complex exponential problems, solve for x: 1)e^(i*pi) + 2e^(i*pi/4)=? 2)3+3=3i*sqrt(3)=xe^(i*pi/3) MY attempt: I'm not really sure of what they are asking. For the 1st one I used the e^ix=cos(x)+i*sin(x) and got -1+sqrt(2) +sqrt(2)i 2) I solved for x and fot (3+3i...

**chemistry**

okay thank you very much :)

**chemistry**

thanks for the help i really appreciate it :D

**chemistry**

i know how to grapgh it and all i am only stuck with how to find the intial molar concentration. i believe you're telling me the step to finding the ka value. sorry i am a little confused with this

**chemistry**

the data is Vol. of NaOH added 0 1 2 3 4 5 10 15 20 21 22 23 24 25 26 27 28 29 30 35 40 45 50 pH 2.92 3.47 3.79 3.98 4.13 4.25 4.67 5.03 5.57 5.72 5.91 6.23 8.78 11.29 11.59 11.75 11.87 11.96 12.22 12.36 12.46 12.52 this is the data and this was given

**chemistry**

so this is the question: you will be given a sample of nictinic acid with an unknown concentration, and it will be titrated with 0.100M NaOH. instead of measuring the volume of the basic solution required to reach the endpoint, however, you will measure the pH. Then you will g...

**chemistry **

the chemical equation of nicotinic acid is C5H4NCOOH + NaOH --> C5H4NCOONa + H2O i need to calculate the intial molar concentration of this acid, based on the ratio in which the acid and base react. Please help i cant figure it out,

**Physics**

Stand two plane mirrors on their edges and parallel to one another. Place a coin between them near one end. How many images do you see? Draw a ray diagram to explain the formation of the images.

**Physics**

Stand two plane mirrors on their edges and parallel to one another. Place a coin between them near one end. How many images do you see? Draw a ray diagram to explain the formation of the images.

**Chemistry**

What is the mass of water that can be heated from 39 C to 80 C by the combustion of 150 g of methane. CH4 + 2O2 => CO2 + 2H2O Delta H= -890kJ

**Chemistry**

a)vii b)i

**algebra 2**

help please!! state the possible rational zeros for each function. then find all zeros. y=x^3-13x^2-x+13 show all the step please .thanks

**English**

Which sentance shows the verb in correct agreement with the subject? I have narrowed it down to these two sentences: A. Peggy or Phyllis drive me to Florida every winter. B. Not only the muffler but also the spark plugs need to be replaced. I want to go with A, but B also soun...

**Science**

What things in the environment where I live in Hollister, CA determine the local ecosystem?

**algebra**

Is this mrs.. Berry

**grammar**

Which of the following contains a correct, standard use of a comma

**calculus**

Find the midpoint of the line segment joining the points P1 and P2 P1=(-1,5); P2=(2,0) m=(x,y)=? type an ordered pair Please show work

**calculus**

Find the distance d(P1,P2)between the points P1 and P2. P1=(-5,2) P2=(2,1) d(P1,P2)=? *all the 1's and 2's are to be lower down.* Please show work

**math**

the width of a rectangular garden is 2 m less than its length. Determine the dimensions of the garden if the area is 36 m2. thanks!

**CHEMISTRY**

(c) What is the value of the degree of polymerization n of isotactic PB with a molecular weight of 3.091×105 g/mol?

**pre algebra**

a typist works from 10am to 6pm making $120 for the day. after typing from the end of page 8 to the end of page 50, find the number of pages per hour. find the rate of pay in dollars per page

**math**

Solve 4a2 + 25 = –20a by factoring. Verify your solution Solve and verify the following equation: 13x2 + 35x + 21 = –12x2 – 25x – 15

**math**

One bag contains 6 red chips and 5 yellow chips. Another bag contains 6 red chips and 4 yellow chips. A chip is drawn from each bag. What is the probability that both chips are yellow?

**ASAP help CHEMISTRY**

I am completely lost on partial pressure. Please work it out for me so i can see the step by step. THANKS!

**ASAP help CHEMISTRY**

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?

**algebra 2**

2x^2-5x-3 show all the step please thanks

**algebra 2**

find the solution ,show all the step please y=x^3+125

**chemistry**

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−6 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in ...

**CHEMISTRY HELP PLEASE**

so am i not using V=nRT/P

**CHEMISTRY HELP PLEASE**

2NaN3(s)==>2Na(s) + 3N2(g) How many liters of N2 are produced at STP if the air bag contains 114g of NaN3 ?

**algebra 2**

how can i solve this help please show the step 3square rood of 64x^4

**algebra 2**

what is the square root of 196x^12

**algebra 2**

take the square root problem square root 196x^12 show the step please thanks

**algebra 2**

take the square root of problem square root 64x^6

**algebra 2**

find the zeros of quadratic ( 8v+7)(v-2)=0 show the step please

**algebra 2**

take the square root of problem square root 64^6 please show all work

**algebra 2**

find the zeros of quadratic ( 8v+7)(v-2)=0 show the step please

**Introduction to High School**

D. A desk stocked with supplies

**Introduction to High School**

All of the following are characteristics of an effective study environment EXCEPT: A. a relaxing area such as your bedroom B. comfortable and balanced temperature C. ample amounts of natural light D. a deck stocked with supplies

**social studies**

IN THE ELECTION OF 1912, Teddy Roosevelt's Bull Moose Party platform was built around what he called the a.fair deal b.square deal I think it's a fair deal but not sure

**statistics**

Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

**statistics**

Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

**algebra 2**

check my answer please find the number of zeros(x-intercepts) y=3k^3-6k^2-45k=k(3k+9)(k-5)= k(3k^2-15k+9k-45)=k(3k^2-6k-45) or should i do it 3k(k-5) (k+3)=3k(k^2+3k-5k-15)=3k(k^2-2k-15) which on is the right one please let me know.thanks

**Geometry**

The lengths of the sides of a triangle are 3,5, and 7 inches. How many inches long is the shortest side of a similar triangle that has a perimeter of 75 inches? F.10 G.12 H.14 H.15 k.22

**algebra 2**

-7.8

**algebra 2**

find the number of zeros(x-intercept) y=a^2+a-56 show the step please.

**algebra 2**

i have big number -45,99,127,358

**algebra 2**

given the zeros,write a polynomial equation in factored form.zeros: -45,99,127,358 show all the step please.

**algebra 2**

given the zeros, write a polynomial equation in factored form.zero -5,9,12 show all the step please

**chemistry**

You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

**chemistry**

You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

**chemistry**

You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

**chemistry**

You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

**chemistry**

You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

**chemistry**

An undesirable consequence of welding steel by acetylene torch is the rise in hydrogen concentration in the metal. That hydrogen contamination embrittles the steel. The metal is typically subjected to a vacuum heat treatment to restore ductility. A steel part is placed in a va...

**chemistry**

"Carburization" of pure iron (Fe) is carried out at 950∘ C. It is desirable to achieve a carbon content of 0.9% at a depth of 0.1 mm below the surface. A constant supply of carbon at the surface maintains a surface concentration of 1.2%. Assuming the diffusivit...

**math**

make a 5 by 5 tile uisng 5 different colors. None can be in the same row nor be diagional.

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