# Posts by please help!

Total # Posts: 128

**math **

For questions 1 and 2, use the integer values of x from -3 and 3 to graph the equation 1. y= -2x^2 +3 (the ^ means an exponent) 2. y= 1/3 |x| -2 Find the horizontal change and the vertical change from the translation P(4, -4) --> (-4, 7)

**Math**

Thanks I lot :) You really helped

**Math**

Graph the linear equation 5. y = 3x + 3 My answer: D (probably wrong) 6. Find the slope of the line through (-9,-10) and (-2, -5) A: -5/7 B: 7/5 C: 5/7 D: -7/5

**Physics**

A square-shaped loop carries current I. What is the magnitude and the direction of the magnetic field at point P, which is located on the bottom segment of the loop? Each side of the square loop has length d. The answer should be given in terms of d, I, pi, and the ...

**Math **

Write a list of steps that are needed to find the measure of angle B. A measures 72 degrees and C measures 113. What does B measure?! Please help!

**Math: Geometry**

Yes they are different

**Math: Geometry **

2. Name four line. Segments that have point B as an endpoint. A. AF, CH, AE, BE B. BA, BF, BC, BH 3. AF, CH, AE, BE 4. BA , BF, BC, BH Please help!

**Algebra**

suppose that y is directly proportional to x and that y=10 when x=3. Find the constant of proportionality k. K= Use y=kx to find when x=6 Y= Is the answer: K=3.33 Y=9.99 Please help. I'm so confused.

**Math**

At the end of the course David averaged a 90% on Tests; 80% on Quizzes; 60% on Quick Checks; 90% on Discussions; 100% on Participation and 95% on Sample Work. What would be his final percentage to the nearest tenth and please show how you got your answer! Thank you so much

**Social Studies**

I am stuck on my practice test and test and pre test of, The Revolutionary War. As you can see I am far behind. Can someone give me resources? I have read my books over and over again.

**SS**

If anyone is looking at this, and knows the answers to everything in this test please tell!!

**SS**

thanks

**SS**

Here is the multiple choice: Farms in the north have harsh winters, and farms in the south have mountains to deal with.**** Farms in the south have harsh winters, and farms in the north no longer have growing seasons. Farms in the north have longer growing seasons than the ...

**SS**

How does the geography of Eastern Europe most affect farming in the region? There's more, but please answer this question first. If you know all the answers to the test please tell me them! Thanks!

**Math**

A new oil field has just begun production. The first oil removed is the easiest to get out, and so production falls as time goes on. The instantaneous rate at which oil can be extracted is 14% of the amount of oil remaining per year. Here, "instantaneous" refers to ...

**Math**

A new oil field has just begun production. The first oil removed is the easiest to get out, and so production falls as time goes on. The instantaneous rate at which oil can be extracted is 14% of the amount of oil remaining per year. Here, "instantaneous" refers to ...

**Math**

Can someone please help me? Anyone?

**Math**

Anyone please!!!

**Math**

Can someone please help me?

**Math**

Triangle ABC is reflected over the y-axis what are the coordinates of the reflected triangle describe in words what happens to the x coordinates and the y coordinates of the original triangle's vertices as a result of this reflection. Please help! Thank you!

**World History**

05.06 HC)Suppose a historian wanted to argue that the Enlightenment had a more positive influence on the American Revolution than on the French Revolution. Which statement below would be the strongest evidence for the historian's view? The French Revolution overthrew a ...

**World History**

Thank you!!!

**World History**

Is it C?

**World History**

Which statement supports the claim that the political philosophy of John Locke was as revolutionary as the scientific revolution of Copernicus? *****a. Just as Copernicus replaced the Earth with the Sun at the center of the solar system, Locke replaced the individual with the ...

**Science Help!**

Long hair is recessive in cats. Which of the following Punnett squares shows a cross that would result in the probability that 75% of the offspring will have short hair?

**Science**

Thank you! Can you explain though? Please if you don't mind...Thanks. ^_^

**Science**

In pea plants, purple flowers are dominant over white flowers. Which Punnet square correctly shows the cross of a plant with white flowers and a plant that is heterozygous for purple flowers? A. Aa,Aa, aa, aa B. Aa,Aa, Aa,Aa C. AA,Aa, Aa,aa D. AA,AA, Aa,Aa

**Science**

1. ____ are stored by the body as energy reserves. Lipids Carbohydrates Proteins Nucleic acids C?

**Math**

I rechecked the answer choices from the actual assignment and they are as listed above!

**Math**

Which equation has a graph perpendicular to the graph of 7x = 14y - 8? Y = 2x - 7 Y = -1/2x + 4 Y = 1/2x + 1 Y = 2x + 9 B?

**Math**

Which equation has a graph parallel to the graph of 9x + 3y = -22 Y = 3x - 22 Y = 3x + 8 Y = 1/3x + 12 Y = -1/3x - 2*** Please help @Ms. Sue

**Math**

1. ____ are stored by the body as energy reserves. Lipids Carbohydrates Proteins Nucleic acids

**Science**

Well, I think.

**Science**

What is/are the main factor(s) that determine(s) that your plants will grow into bean plants (or other fast-growing plants that you used for your experiment) and not some other type of plant (genetics, environment, or both)? Explain your answer

**Physical Science**

Why do molecules in a cup of water move at a variety of speeds?

**Physics**

A typical tumor treated with radiotherapy may receive 400 Gy per 250g. How many disintegrations of caesium-137 atoms are required to provide that absorbed dose? Help would be appreciated!

**Math**

Find T 2200=7500/(1+9e^-o.o21972*T) Can I multiply both sides by 1+9e^-0.021972*T ?

**Algebra**

1.How do I find the center of a circle using the points (2,8) (-4,6) (1,-1) ? 2. The Radius of the circle? 3. Equation of circle THANKS!

**ENGLISH**

In "A Man Called Horse," After his wife leaves him, Yellow Robe Behaves recklessly in battle because he A. would rather die than live with the bitterness he feels as a result of his lost pride B. is trying to gain membership in the society known as the foxes C. ...

**statistics**

An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent. On the other hand, the firm reports that the yearly returns on tax-free municipal bonds are...

**S.S redo**

8d 9c 10a 11b 12b

**S.S redo**

1d 2c 3b 4a 5b 6b 7c

**S.S redo**

1. The economic centers of the Northeast are the region's __________. (1 point) farms fisheries forests cities 2. Two major ports in the South are ______________________. (1 point) Atlanta and Dalton Raleigh and Austin Miami and New Orleans New York City and Philadelphia 3...

**S.S please help!**

Oops wrong questions! posting new ones right now!

**S.S please help!**

1d 2c 3b 4a 5b 6b 7c My answers

**S.S please help!**

1 Marks: 3 Which statement best describes the government of Canada? Choose one answer. a. The monarch of Britain has total control over Canada. b. The Canadian parliament is ruled by the United States. c. Canada has complete power over its own government. d. The prime minister...

**Algebra**

Jon and Melissa agree to meet in Chicago for the weekend. Jon travels 236 miles in the same time that Melissa travels 224 miles. If Jons rate of travel is 3 mph more than Melissas, and they travel the same length of time, at what speed does Jon travel?

**chemistry**

What is the molarity of 5g of O2 in 250 mL? Show work, please.

**math**

The quantity demanded x (in units of a hundred) of the Mikado miniature cameras/week is related to the unit price p (in dollars) by p = −0.2x2 + 80 and the quantity x (in units of a hundred) that the supplier is willing to make available in the market is related to the ...

**physics**

A spherical generator is used to produce a -15.00D surface on glass of refractive index 1.80. The diameter of the cutting tool is 80mm and the radius of the cutting surface is 4mm. What is the angle between the axis of the tool and the axis of the lens?

**Physics**

A spherical generator is used to produce a -15.00D surface on glass of refractive index 1.80. The diameter of the cutting tool is 80mm and the radius of the cutting surface is 4mm. What is the angle between the axis of the tool and the axis of the lens?

**MATH/PHYSICS**

1.) A bird can fly 20 km/h. How long does it take to fly 12 km?

**PHYSICS**

Vector V1 is 6.29 units long and points along the negative x axis. Vector V2 is 4.23 units long and points at +35.0° to the +x axis. (a) What are the x and y components of each vector? (b) Determine the sum V1 + V2.

**calculus**

I guess it's the format but I am little confused about what you did....

**calculus**

Can someone help me understand how to find the derivative of these two problems: (t^2-1/t^2+2)^3=y and y=sin^32x? I think with the first one, I could just foil it maybe and cancel but I don't know what to do with the ^3...and then the second one I haven't gotten the ...

**math**

I have to evaluate the limit of these problems and I can't figure them out! 1.) Lim x-> 1 x^2+x-2/x^2-x 2.) (please note that the -2 is not under the square root) Lim x->0 sqroot 4+h -2/ h

**Algebra 2**

log4 (x-2) - log4 (x+1) = 1

**Algebra 2**

log x 8 = 2

**Chemistry**

oops the equation is actually 2SO2 (g) + O2 (g) yield 2SO3 (g) the yield part was an arrow facing both directions, not just the product side

**Chemistry**

Consider the following equilibrium at 1000K: 2SO2 (g) + O2 (g) ¡ê 2SO3 (g) A study of this system reveals that there are 3.5E-3 moles of sulfur dioxide gas, and 4.8E-3 moles of oxygen gas present in a 11.0L flask at equilibrium. The equilibrium constant for this ...

**Math**

Change into standard form 1. x^2+6x+4y+5=0 2. y^2+12x+2y+=-25

**Math**

Write the standard equation of the ellipse with the given characteristics Vertices: (0,7) (0,-7) foci: (0,2) (0,-2)

**math**

Suppose $5000 is deposited in a bank account that compounds interest four times per year. The bank account contains $9900 after 13 years. What is the annual interest rate for this bank account? i already set it up but i don't know where to go from there. Please help

**Physics**

I do not understand the part in which you solve for x. Is it supposed to be the cos of 60 equals x divided by .2?

**Physics**

The three 500 g masses in the daigram are connected by massless, rigid rods to form a triangle. What is the triangle's rotational energy (in J) if it rotates at 1.50 rev/s about an axis through the center? (Diagram shows equilateral triangle with 500g masses at each point...

**chemistry**

I actually just redid it and found something close to 9.21?

**chemistry**

omg, thank u! I ended up getting something 1.70! THANKS!

**chemistry**

How many grams of NAC2H3O2 must be dissolve in enough water to prepare 250.0 mL of a solution with a pH= 9.200? Molar mass of NaC2H3O2 ia 82.03 g/mol. Ka for C2H3O2H is 1.8x10^-5

**math**

i'm having trouble with this math equation 5/2x^2-1/2^4 (need to find greatest common factor)

**CHEMISTRY**

ETHANOL (C2H5OH) HAS A DENSITY OF 0.80g/ml. IF A 10%(v/v) MIXTURE OF ETHANOL IN WATER WAS PREPARED HOW MANY GRAMS OF ETHANOL WOULD BE IN 100ML OF THE MIXTURE? (ASSUMING MIXED VOLUME IS THE SUM OF THE PARTIAL VOLUME)

**Science/Math**

Hello, Suppose that a newly discovered element called centium has three isotopes that occur in nature. These are centium-200, centium-203, and centium-209. Assume that these isotopes occur in equal amounts in nature. What will be the average atomic mass of this element?

**Math**

Write and equation to match the problem situation below. Callie has 4 rimes as many CDs as she has DVDs. She has a total of 60 CDs and DVD. How many dvds, d, does callie have?

**chemistry**

when water is combined with magnesium nitride to produce magnesium hydroxide and ammonia gas, is this reaction endothermic or exothermic and why?

**chemistry**

when water is combined with magnesium nitride to produce magnesium hydroxide and ammonia gas,

**Math**

c - 1/4c = 49.95

**Math**

2/7 k - 1/14 k = -3 does k= -42?

**Math!**

x/4 - 3x/2 = -1/2 I do not understand at all

**Math**

Luke bought some things at the store. He paid $5.98 for a pizza, $3.75 for a case of dr.pepper, $2.50 for a box of brownie mix. And $1.01 in sales tax. What information is needed to find Lukes correct change?

**MATHE HELP!**

Write an expression that can be used to find the average if these numbers: 7, -2, 10, -4, -9

**Math**

Maratha bakes between 4 1/4 and 9 3/4 hours each day at her bakery. About how many hours does she spend baking in one week?

**MATH**

A triangle with two congruent sides and two angles that both measure 45 is a.scalene and right b.isosceles and acute c.isosceles and right d. Equilateral and acute

**Math Please Help**

Oh sorry I meam two angles that are complementary have s sun of 45

**Math Please Help**

Which statement is not true? Two or angles that are supplementary have a sum of 180 or Two angles that are complementary have a sum ot 45

**Math**

Which of the following shapes could not represent a top, front, or side view of a pentagonal prism? a. A pentagon b. A triangle c. A square d. A rectangle

**Math Please Help**

Ok I get it. Thank you!!!

**Math Please Help**

But that equals 24 and that not a answer on the thing

**Math Please Help**

3/2 = .6 repaeating x 16 = 10.6 repeating and 16/1 x 2/3 = 10.6 reapeating

**Math Please Help**

I got 10 something but it's not one of the answers

**Math Please Help**

how?

**Math Please Help**

could I do it in a proportion?

**Math Please Help**

The premiters of two equilateral triangles are in the ratio 2:3. If the perimeter of the smaller triangle is 16 cm what is the measure of a side of the larger triangle?

**physics**

A 66.0 kg man is ice-skating due north with a velocity of 5.70 m/s when he collides with a 36.0 kg child. The man and child stay together hand have a velocity of 2.20 m/s at an angle of 33.0° north of east immediately after the collision. What was the velocity of the child...

**physics**

I tried this and got 118882 for Va' and 390097 for Va but it was wrong?

**physics**

An alpha particle collides with an oxygen nucleus, initially at rest. The alpha particle is scattered at an angle of 60.9° above its initial direction of motion, and the oxygen nucleus recoils at an angle of 51.9° on the opposite side of that initial direction. The ...

**Chemistry**

Thank you! what is the 2257 from?

**Chemistry**

If 1.10 g of steam at 100.0 degrees celsius condenses into 38.5 g of water, initially at 27.0 degrees celsius, in an insulated container, what is the final temperature of the entire water sample? Assume no loss of heat into the surroundings

**physics**

A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 795 m/s. The barrel is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.042 m below the center. What is the horizontal distance between the end of the ...

**physics**

A golfer imparts a speed of 32.1 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in one" that the...

**College Calculus 1**

A runner sprints around a circular track of radius 150 m at a constant speed of 7 m/s. The runner's friend is standing at a distance 300 m from the center of the track. How fast is the distance between the friends changing when the distance between them is 300 m? (Round to...