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Posts by sandra

Total # Posts: 1,145

ALGEBRA
Simplify 4(sqrt)6/(sqrt)30 by rationalizing the denominator. Show how.

ALGEBRA
Thank you

ALGEBRA
The size of a television is given by the length of the diagonal of the screen. The ratio of the height to the width of wide flat-screen TV is 8:15. Find expressions for the width and height of a wide-screen TV in terms of the length of its diagonal.

Art
What is value? • the lightness or darkness of a color • the intensity of a color • the number of colors being used in a 2D artwork • the difference between two colors

ALGEBRA
Solve for b. [sqrt] b^4/25=4 I do not know how to type two of the possible answers.

ALGEBRA
Thanks much

ALGEBRA
A right triangle’s hypotenuse is 20 cm long. What is the length of the side opposite a 60° angle? Give your answer to the nearest tenth of a centimeter. • 40 • 18.5 • 20 • 17.3 Please show how.

ALGEBRA
I may not be writing it correctly but I did find out it was x =45. Thanks for you help.

ALGEBRA
2nd posting - my mistake When will the dependent variable in the equation y= sqrt [x+4-3] equal or exceed 4 • x ≥ –0.17 • x ≥ 45 ** is it this one? • x ≥ 48 • x ≥ 53

Algebra
I am not sure I am writing this correctly: What is the domain of the function y=3(sq rt)6x+42 • x ≥ 0 • x ≤ 7 • x ≥ –6 • x ≥ –7

Algebra
The function t=[(sqrt)(d/16)] models the time (t) in seconds that an object has been falling after the object has fallen d feet. When will the time be more than 1 minute? • d ≥ 16 ft • d ≥ 225 ft • d ≥ 3,600 ft • d ≥ 57,600 ft

Algebra
Yes, I am not sure how to write it out. Do you know where I can get the symbol for square root? I can't find it in the "Symbol" tools.

Algebra
When will the dependent variable in the equation Y=[(sqrt)(x+4-3)] equal or exceed 4? • x ≥ –0.17 • x ≥ 45 • x ≥ 48 • x ≥ 53

ALGEBRA
I think this is the right way???? When will the dependent variable in the equation y= sqrt [x+4-3] equal or exceed 4 • x ≥ –0.17 • x ≥ 45 • x ≥ 48 • x ≥ 53

ALGEBRA
When will the dependent variable in the equation Y=[(sqrt)(x+4-3)] equal or exceed 4? • x ≥ –0.17 • x ≥ 45 • x ≥ 48 • x ≥ 53 Show how.

ALGEBRA
Simplify. (x^2-3x-10)/(x+2) How? (I don't have any answers for this one)

ALGEBRA
The temperature, T, of a given mass of gas varies inversely with its volume, V. The temperature of 20 cm3 of a certain gas is 15°C. What will the temperature be when it is compressed to a volume of 5 cm3? • 10°C • 300°C • 6.67°C • 60°C How?

ALGEBRA
That helps a lot, thanks.

ALGEBRA
Solve. 1/(3x-6) – 5/(x-2) = 12 • X=34/9 • X= -29/18 • X= -34/9 • X=29/18 How?

Algebra
No problem, got this one.

Algebra
Simplify into one fraction. 3/(x-3)-5/(x-2) • (-2x + 9)/(x-3)(x-2) • (-2x)/(x-3)(x-2) • (-2x -9)/(x-3)(x-2) • (2x+9)/(x-3)(x-2) How?

ALGEBRA
Thanks so much

ALGEBRA
In the meantime I got the last one but this one I can't figure... Divide. [(x^2-9)/(x-5)]/(x+3) • (x-3)/(x-5) • (x-5)/(x-3) • [(x+3)/(x-3)]/(x-5) • (x+3)/(x-5) How?

ALGEBRA
Lost in the shuffle; sending again... Simplify into on fraction. (-5x/x+3)-(7/x+3) • (-5x-7)/(x+3) • (-5x+7)/(x+3) • (-5x-7)/(x+3)^3 • (-5x+7)/(x+3)^2

ALGEBRA
Multiply: (K+3)/(4K-2)*(12K^2 + 2k – 4) • 3(k+3)/(3k+2) • 3(k+3)(2k-1)/2 • (x-5)(3x+2) • (x-5)(12x+8) How? 11

Algebra
Simplify into on fraction. (-5x/x+3)-(7/x+3) • (-5x-7)/(x+3) • (-5x+7)/(x+3) • (-5x-7)/(x+3)^3 • (-5x+7)/(x+3)^2 How?

Algebra
Simplify. (3/5a)*(1/a^2) • 3/5a^2; where a ≠ 0 • 3/5a^2 • 3/5a^3; where a ≠0 • 4/5a^2; where a ≠0 How?

Algebra
Simplify. x/(7x+x^2) • 1/(7+x); where x ≠-7 • 1/(7x); where x≠0 • 1/(7+x); where x≠0,-7 • 1/7 How?

Algebra
Solve. (–10x3 + 30x – 20) ÷ (–5x + 5) • 2x2 – 2x + 4 • –2x2 – 2x – 4 • –2x2 + 2x + 4 • 2x2 + 2x – 4 How?

Algebra
I have to identify the system of equations, if any for: -2x-4=1, 12=-6x-3 no solution? infinitely many solutions? (0,-1)? or (-1,0)?

Algebra
My lapse in memory... Solve. (2/x) + (12/x) =7 • x = 2 • x = –2 • x = 28 • x = –28

Algebra
Solve. • x = 2 • x = –2 • x = 28 • x = –28 How?

Algebra
It always help to see how it is done. Thanks.

Algebra
The time, t, required to drive a certain distance varies inversely with the speed, r. If it takes 7 hours to drive the distance at 55 miles per hour, how long will it take to drive the same distance at 65 miles per hour? • about 6.25 hours • about 385.00 hours •...

Algebra
O.K. got it.

Algebra
Divide. (–6m^9 – 6m^8 – 16m^6) ÷ (2m^3) • –3m9 – 3m8 – 8m6 • –3m6 – 6m8 – 16m3 • –3m6 – 3m5 – 8m3 • –3m6 – 3m5 – 16m3

Algebra
3.43 hours?

Algebra
Dorothy and Rosanne are baking cookies for a party. Working alone, Rosanne can finish the cookies in 6 hours. Dorothy can finish them in 8 hours if she is working alone. How long will it take them to bake the cookies if they are working together? Round your answer to the ...

Algebra
Thank you - helps to know how.

Algebra
A catering company charges a $300.00 set up fee and $10.00 per person for a lunch buffet. Approximately how many people must attend the lunch so that the total cost per person is $14.00? (1 point) • 75 people • 30 people • 214 people • 440 people

Algebra
Thanks much

Algebra
Bob drove 120 miles on his vacation. He drove an average of 1.2 times faster on the 2nd 60 miles of his trip than he did on the first half of the trip. Which expression represents the time he spend driving? Let x=his speed on the first half of the trip. • 110/x • 120...

Physics
Mountain pull. A large mountain can slightly affect the direction of “down” as determined by a plumb line. Assume that we can model a mountain as a sphere of radius R = 3.00 km and density (mass per unit volume) 2.6 × 103 kg/m3. Assume also that we hang a 0.250...

Science
Sorry, I forgot to mark the one I think is the answer -- globa warming -- Thank you for your response. I am not a global warming fan so I wanted to be sure I answered the way they wanted me to.

Science
Am I correct? Which of the following is an example of human impact on climate changes? • the greenhouse effect • changes in solar output • global warming • changes in the tilt of Earth's axis

Physics/Algebra
That helps, thanks.

Physics/Algebra
Physics: For a 225-watt bulb, the intensity I of light in lumens at a distance of x feet is I=225/x^2. a. What is the intensity of light 5 ft from the bulb? b. Suppose your distance from the bulb doubles. How does the intensity of the light change? Explain.

Algebra
Thanks much, that helps a lot.

Algebra
Word problem: A new photocopier can make 72 copies in 2 min. When the older photocopier is operational, the two photocopiers together can make 72 copies in 1.5 min. How long would it take the older photocopier to make 72 copies working alone? Show work.

Geometry
Yes it is, thanks.

Geometry
Geometry: the width and area of a rectangle Is (4b^3+5b-3)/(2b-1) What is the length of the rectangle? Show work.

Algebra
Thanks much -- this help me learn.

Algebra
Thank you but can you put it in "factor form" or show how you got the answer?

Algebra
Divide this rational expression and polynomial (12x^2 + 9x-7)/(3x)

Algebra
I should know, eh? Thanks, Steve

Algebra
Simplifing rational expressions Simplify the expression & state any excluded values: (2s^2 - 5s - 12) / (2s^2 - 9s + 4)

Algebra
Thanks much!!!

Algebra
Simplify each expression. State any excluded values. (2x^2 + 6x) / 10x^3

Art and Creative development for Young children
Portfolios are a collaborative effort in that

Algebra
Sorry, and you are appreciated.

Algebra
what is the excluded value of the function? y = 4/(9x – 45) • –5 • 0.2 • 5 • –0.2

Algebra
Sorry, my oversight... what is the excluded value of the function? y = 4/(9x – 45) • –5 • 0.2 • 5 • –0.2

Algebra
y = (4)/(9x – 45) • –5 • 0.2 • 5 • –0.2

Biology 10B
According to the pressure-flow hypothesis, which of the following statements is not true • Water moves from the xylem to the phloem of a plant. • Water is necessary for sugars to move through phloem. • Phloem is able to move sugars in either direction to meet ...

Algebra
You are a great help.

Algebra
Suppose that y varies inversely with x, and y = 0.2 when x = 2. What is an equation for the inverse variation? y = 1.8x y = 0.4/x x = y/1.8 y = x/0.4

Algebra
Thanks much!

Algebra
I would appreciate the steps to the answer please... Suppose that y varies inversely with x, and y = 6 when x = 8. What is an equation for the inverse variation? • y = x/48 • y = 2x • x = y/2 • y = 48/x

English 10
Thank you.

English 10
Thank you; which one is it -- developing a subtopic?

English 10
All of the following are writing strategies associated with editing except • checking your spelling. • cleaning up formatting. • developing a subtopic. • fixing punctuation errors.

Stats
the typical saturday the oil change facility will perform 40 oil changes between 10 am and 12pm. treating this as a random sample, what mean oil change time would there be a 10% chance of being at or below? There is a 10% chance of being at or below a mean oil change time of ...

English
Very true, thank you.

English
Choose the correct usage to complete the sentence: Are you ______________ to be in here? Suppose or supposed

Algebra
Thank you, now I can.

Algebra
Add: (3/2a) + (5/2a) Possible answers: 8/4a, 2/a, 15/4a2^ or 4/a

Algebra
Thank you, it helps to know how...

Algebra
Add... 8 + (x-1) / (x+4)

Algebra
Thank you, but I don't know how. I will post the problem again. Those in the know should know the correct answer whether posted or not.

Algebra
Thank you but that is not one of the answers we can use: 8/4a, 2/a, 15/4a2^ or 4/a are the choices.

Algebra
Add (3/2a) + (5/2a)

Algebra
I always appreciate showing how it is done.

Algebra
Solve... (x+12) / (x+4) = (x) / (x+8)

Algebra
That is a great help, thanks.

Algebra
Solve? (10 / 3x) + (4/3) = (7 + x) / (2x)

Algebra
Okey, thanks

Algebra
What is the undefined value of... (3b^2 + 13b + 4) / (b + 4)

Algebra
Why are you asking me this question? I have no idea. I am the one who needs help.

Algebra
What is the undefined value of... (3b^2 + 13b + 4) / (b + 4)

Algebra
Edie can paint a wall in 3 hours. Dan can paint the same wall in 6 hours. If they work together, how many hours will it take Edie and Dan to paint the wall?

Physics
Gravity on Mars is 1/3 of that on earth. If Mars atmosphere is only 2 km thick, what is atmospheric pressure on Mars?

Physics
An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?

Algebra
Thanks much

Algebra
John walked 10 miles on Saturday. He walked twice as fast on the second 5 miles of his walk than he walked on the first 5 miles of his walk. Which expression represents the time he spent walking? Let x = John's speed on the first half of his walk.

Algebra
That really helps, thanks.

Algebra
Multiply (x^2 + 8x + 15) / x – 4 * (x^2 – 16) / 2x + 6

Algebra
I don't understand your question since I don't know the value of b.

Algebra
What is the undefined value of: (3b^2 + 13b + 4) / (b + 4)

Algebra
Thanks much, that helps.

Algebra
Simplify (2a + 2) / a^2 – 1)

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