Tuesday
May 26, 2015

Posts by Julie


Total # Posts: 992

Algebra please help
f(x)=1/3(x+7)^2+4 find the vertex,the line of symmetry, and the max or min. value of the f(x) graph the function. thank you in advance :)
June 8, 2011

world geography
What are the "many islands" people also called?
June 5, 2011

probability and statistics I NEED HELP
A six-sided die is rolled 20 times and a 5 is rolled 9 times. a) State a null and alternative hypothesis for the die being fair. b) Can the null hypothesis be rejected at the .01 significance level?
May 31, 2011

Algebra
w^4-6w^2-2=0 what is the solution?
May 24, 2011

Algebra
-7 and -4 the quadratic equation is? Thank you in advance :)
May 24, 2011

Chemistry (PLEASE HELP)
thanks, now do u know the units to this problem
May 23, 2011

Chemistry (PLEASE HELP)
How much energy (in joules) is contained in one mole of photons (electromagnetic quanta) of frequency 2.3E+19 Hz?
May 23, 2011

algebra
Write an algebraic expression for the following: If James spends 5/6 of his weekly allowance (x) on a movie, how much will James have left?
May 23, 2011

Criminal justice
why does the system require that everyone is entitled to a fair trail, even if the person is caught red-handed
May 22, 2011

Chemistry-Help Please!
@ 20 Celsius - 22g CuSO4 / 100g H2O @ 40 Celsius- 42g CuSO4 / 100g H2O Using this, answer whether these are saturated or unsaturated @ 40 Celsius is 5g CuSO4 / 10g H2O @ 40 Celsius is 99g CuSO4 / 250g H2) I was told that the first one is unsaturated and the second one is ...
May 19, 2011

Chemistry
Can anyone tell me if I am right on these? Calculate the amount of solute needed to make each of the solutions 225g of 10% (m/m) K2CO3 solution Answer: 22.5g K2CO3 0.50kg of 18% (m/m) KOH solution Answer: 90g KOH
May 19, 2011

Chemistry
@ 20 Celsius - 22g CuSO4 / 100g H2O @ 40 Celsius- 42g CuSO4 / 100g H2O Using this, answer whether these are saturated or unsaturated @ 40 Celsius is 5g CuSO4 / 10g H2O @ 40 Celsius is 99g CuSO4 / 250g H2) I was told that the first one is unsaturated and the second one is ...
May 19, 2011

math
i mean the balance after the interest is added is $960. how do i figure out the principle and the interest? The rate is 4% and the time is 5 years. Thanks!
May 16, 2011

math
No the balance not the principle. The principle and the interest are the two amounts we don't know. I know if you add the two together you get $960 but I can't figure out to get those two numbers.
May 16, 2011

math
it is a simple interest problem: the balance is $960, the rate is 4% and the length is 5 years -- what is the interest?
May 16, 2011

CRT 205
The following activity helps you sharpen your skills in recognizing deceptive reasoning. The statements below are derived from the viewpoints in this chapter. Beside each one, mark the letter of the type of deceptive appeal being used. More than one type of tactic may be ...
May 15, 2011

thank you mathmate
Thank you for your help
May 14, 2011

Algebra
what is the square root of 12x^3y^2
May 14, 2011

vocab
poverty, paintings, interests
May 9, 2011

Chemistry
This should be saturated When you divide 22g CuSO4 per 100 g H20 by 4. You get 5.5g of CuSO4 per 25g H2O. Does this help?
May 4, 2011

chappell
what is the lattice method for 2 times 46
May 2, 2011

algebra
a jeweler purchased 5 oz of a gold alloy and 20 oz of a silver alloy for a total cost of $540. The next day at the same price per ounce, the jeweler purchased 4 oz of th egold alloy and 25 oz of the silver alloy for a total cost of $450. Find the cost per ounce of the gold and...
April 29, 2011

Chemistry
I got 3.39%, correct? Thanks
April 29, 2011

Chemistry
A lab assistant prepared a potassium chloride solution for her class by dissolving 5.34 g of KCl in 152g of water. What is the mass percent of the solution she prepared? Could you help me set this up/show me how to do this problem?
April 29, 2011

Probability
Factories A and B produce computers. Factory A produces 2 times as many computers as factory B. The probability that an item produced by factory A is defective is 0.012 and the probability that an item produced by factory B is defective is 0.04. A computer is selected at ...
April 26, 2011

Math
If a pro basketball player has a vertical leap of about 35 inches, what is his hang time? Use the hang-time function V = 48T²
April 24, 2011

Chemistry
Of helium and argon, which will have the higher boiling point and why?
April 20, 2011

Spanish
A mis amigas no ___ comer papas fritas.
April 18, 2011

english - text commentary "Painful case"
Hello, I'm french student and I must to make a text commentary and I need your help finding some idea to develop. It's an extract from "Painful case" by James Joyce Thank you! When he gained the crest of the Magazine Hill he halted and looked along the river ...
April 12, 2011

social studies
What are the pros and cons of textbook social studies learning?
April 10, 2011

physics
just kidding i figured it out.
April 7, 2011

physics
A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 25.0° and the angle of refraction is 14.0°, find the critical angle for the liquid when surrounded by air. im not sure how to start this problem.
April 7, 2011

physics
A convex mirror has a focal length of 19.0 cm. Determine the object location for which the image will be one-fourth as tall as the object. i really need help on this one. im completely stuck!
April 6, 2011

physics
A convex mirror has a focal length of 19.0 cm. Determine the object location for which the image will be one-fourth as tall as the object. i know that 1/f=1/do=1/di. when i put the numbers into the equation i keep getting 23.75 and its saying that its wrong. can you please ...
April 6, 2011

social studies
What are the pros and cons of textbook social studies learning?
April 5, 2011

statistics
Start with x = 100 and add four x values to make a sample of five data such that: a. s = 0 b. 0 < s < 1 c. 5 < s < 10 d. 20 < s < 30
April 5, 2011

Calculus
Find the area of the region enclosed by the inner loop of the curve. r = 5 + 10sin(θ) Any help would be greatly appreciated!!!
April 4, 2011

Calculus II
Find the area of the region enclosed by the inner loop of the curve. r = 5 + 10sin(θ) Thanks for the help!
April 3, 2011

math
12x^4 _______ 42x
March 30, 2011

Algebra
Choose the correct simplification of (3xy6)2(y3)3.
March 20, 2011

physics
A small motor draws a current of 1.76 A from a 110 V line. The output power of the motor is 0.20 hp. (a) At a rate of $0.060/kWh, what is the cost, in cents, of operating the motor for 4.0 h? (b) What is the efficiency of the motor? for (a) i am doing IV*hours*price and its ...
March 14, 2011

math
Turn 7 21 into a percent and decimal. First simplify the fraction. Show your answer on the number line.
March 9, 2011

4th grade math
Aaron's family is driving 80 miles to the mountains. They have already traveled 30 miles. They are traveling at a speed of 50 miles per hour. How many hours will it take them to complete the trip?
March 7, 2011

calculas
how long will it take an ice cube to melt completely? You left out an ice cube ant 1/4 of it melts in 1 hour. Use the following steps to find out how long it will take before it is melted completely. 1-let s represent the side length of the ice cube, and observe that s is a ...
March 6, 2011

algebra
3 index square root 81 I got the answer 3 3index square root 3 is this correct?
February 28, 2011

Algebra
square root xyz cubed.
February 28, 2011

math
Solve for x: log3(x^2-4)-log3(x+2)=2
February 27, 2011

Math
A room is in the shape of a right triangle. The hypotenuse is 8 meters longer than the short leg and the long leg is 4 meters longer than the short leg. Find the length of each side. (ok, now how can it be done if I change each side to cm and km, then ft and yards?)
February 21, 2011

business statistics
The scores on a standardized exam are normally distributed with mean= 50 and variance=16. (a) what percentage of the scores exceed 58? (b) what percentage of the scores lie between 38 and 54? (c) what is the 84th percentile of the distribution?
February 20, 2011

algebra
(x+3)/(x^2-x-12) + (2/x + 3)= (1)/(x-4)
February 20, 2011

algebra
(x+3)/(x^2-x-12) + (2/x + 3)= (1)/(x-4)
February 20, 2011

algebra
(x+3)/(x^2-x-12) + (2/x + 3)= (1)/(x-4)
February 20, 2011

algebra
Factor the Following: 3x^2 + 10xy + 7y^2
February 20, 2011

algebra
This is how the problem looks: (x+3)/(x^2-x-12) + (2/x + 3)= (1)/(x-4)
February 19, 2011

algebra
x+3/x^-x-12 + 2/x+3 = 1/x-4
February 19, 2011

algebra
2/5 - 1/3 Top of complex fraction 2/3 - 3/4 Bottom of complex fraction
February 19, 2011

algebra
whoops x+6/27 = 1/x
February 19, 2011

algebra
x=6/27 = 1/x
February 19, 2011

Algebra
8x^3 + 1728
February 19, 2011

Algebra
-11^-3
February 19, 2011

Algebra
(4y^2)^5 __________ y ^-3
February 19, 2011

algebra
Find the equation of the line that passes through the points ( 8, - 15 )and(-2,5). write the equation in y=mx = b form.
February 19, 2011

algebra
Solve: x-2y= -5 2x+y= -5
February 19, 2011

Algebra
The resistance in an electric circuit varies inversely with the current. If the resistance is 12 ohms when the current is 4 amps, what is the resistance when the current is 8 amps.?
February 19, 2011

Algebra
3 is supposed to be the denominator of 2 6 is supposed to be the denominator of 5
February 19, 2011

Algebra
Complex Fractions _1_ - _2_ x^2 3 ____________ _1_ - _5_ x 6
February 19, 2011

Algebra
_x+6___ = _1_ 27 x is this where I cross multiply?
February 19, 2011

algebra
_2__ = ____2___ x-9 x^2-6x-27 Solve the equations Check solutions to the equations (plug the answer back into the original equation.)
February 19, 2011

Algebra
Help me factor this it's so easy I am not getting it figured out! 8x^2-16xy+8y^2
February 18, 2011

math
what is the difference between odds and probability?
February 15, 2011

Chemistry
I need to find out what the total acid concentration is in Kool-Aid. If 23.3 mL of 0.1043M NaOH neutralize a 60 mL solution of Kool-Aid (10 mL) and water (50 mL), what is the total concentration in a 10.00 mL aliquot of Kool-Aid? If you prepared a standard 250 mL serving by ...
February 15, 2011

Science
How might pollen be carried from the anther to the female part of the flower?
February 14, 2011

Chemistry AP
What is the mass of oxygen in a ml flask if the pressure is 1.00 atm and a temperature of 22.0 Celsius?
February 7, 2011

math
the needle of the scale in bulk food section of a supermarket is 25 cm long. find the distance when the needle rotates 50 degrees
February 6, 2011

physics
Two speakers are driven by a common oscillator at 870 Hz and face each other at a distance of 1.20 m. Locate the points along a line joining the two speakers where relative minima of pressure amplitude would be expected. (Use v = 343 m/s. Choose one speaker as the origin and ...
January 31, 2011

physics help please
Two speakers are driven by a common oscillator at 870 Hz and face each other at a distance of 1.20 m. Locate the points along a line joining the two speakers where relative minima of pressure amplitude would be expected. (Use v = 343 m/s. Choose one speaker as the origin and ...
January 31, 2011

algebra
Please help me write the polynomial by multiplying the factors together? (x+5)(x-4)^2
January 28, 2011

physics help pleased
Two trains on separate tracks move toward one another. Train 1 has a speed of 125 km/h and train 2 a speed of 100.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of sound is 345 m/s.)
January 28, 2011

physics
A commuter train passes a passenger platform at a constant speed of 40.0 m/s. The train horn is sounded at its characteristic frequency of 320 Hz. What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding?
January 28, 2011

algebra
what is the percent of change from $48.50 to $38.80
January 26, 2011

Math
(5x + 10)(5x - 5)
January 17, 2011

Math
The area of a square field is represented by the trinomial x^2-10x+25. Write an expression that would represent the perimeter of the field.
January 17, 2011

Math
Find the area of a rectangle if its length is 5x+10 and its width is 5x-5
January 17, 2011

Math
(numeratorx^-4y^2/Denominator x^-2y^-4)-3
January 17, 2011

Math
lol omg I can't believe I missed that one!
January 17, 2011

Math
(abc)^0
January 17, 2011

Math
does the ^ mean squared? and there were No parentheses
January 17, 2011

Math
I had to simplify the expression: -5exponent2(squared) I got the answer of 25 wrong. Why is that wrong?
January 17, 2011

engineering
If a source is emitting particles at a rate of 15,000 particles per second, what is the flux at 30 cm away from the source?
January 13, 2011

half life
If the radiological half life of a material is 31 minutes, and you have 77 grams now, how much did you have 55 minutes ago?
January 13, 2011

physics
A 215 g mass is attached to a spring and executes simple harmonic motion with a period of 0.250 s. If the total energy of the system is 2.30 J. (a) Find the force constant of the spring. 135.81 N/m (b) Find the amplitude of the motion. i just need help with what equation i ...
January 12, 2011

physics
A 0.44 kg object connected to a light spring with a spring constant of 22.0 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest. (a) Determine the maximum speed of the mass. 28.28 cm/s (b) Determine the speed of the mass ...
January 11, 2011

physics
figured it out
January 11, 2011

physics
A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.00 cm, and the toy is released. If the toy has a mass of 105 g and rises to a maximum height of 75.0 cm, estimate the force constant of the spring.
January 11, 2011

physics
A frog in a hemispherical pod finds that he just floats without sinking in a fluid of density 1.30 g/cm3. If the pod has a radius of 3.00 cm and negligible mass, what is the mass of the frog?
January 7, 2011

algebra 1
a 100- foot cable is cut into two pieces.the first piece is 18 ft longer than the second. how long is each piece
January 6, 2011

pre algebra
$29/kg = how many cents/ g???? im really confused
January 5, 2011

physics help please...
A movable piston having a mass of 8.00 kg and a cross-sectional area of 5.00 cm2 traps 0.200 moles of an ideal gas in a vertical cylinder. If the piston slides without friction in the cylinder, how much work is done on the gas when its temperature is increased from 18°C to...
January 4, 2011

physics
A movable piston having a mass of 8.00 kg and a cross-sectional area of 5.00 cm2 traps 0.200 moles of an ideal gas in a vertical cylinder. If the piston slides without friction in the cylinder, how much work is done on the gas when its temperature is increased from 18°C to...
January 4, 2011

physics help please...
why is the difference in density 350? where does the 1000 come from?
December 20, 2010

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