# Posts by alyssa

Total # Posts: 849

**math**

The stopping distance of a car traveling 25mph is 61.7ft, and for a car traveling 35mph it is 106ft. The stopping distance in feet can be described by the equation y=ax^2 + bx + c, where x is the speed in mph. Find the values of a and b.

**Math**

Yes it is reasonable because 293=290 and 44=50 and 290 - 40 _____ 250 = means rounds to

**math**

use the given advertisement to determine the missing part in each ratio. Write the two unit rates. yogurts 4 packs equals $5.00 question: 4 yogurts equals $5.00 total = 1 yogurt equals $1.25 each = what amount can you get for $1.00

**math**

Use the givem advertisement to determine the missing part in each ratio. write the two unit rates. yogurt 4 packs/$5.00 =4 yogurts/$5.00=1 yogurt/?=?/$1.00

**chemistry**

A solid substance P is soluble in water (1g/ 100mL) at 25°C and 10g/ 100mL of water at 100°C. You are given a sample that contains 10g of P and 2g of impurity G. Describe the procedure to purify P if G is insoluble in water.

**chemistry**

sorry, i actually posted it by accident. thank you for your help

**chemistry**

A solid substance P is soluble in water (1g/ 100mL) at 25°C and 10g/ 100mL of water at 100°C. You are given a sample that contains 10g of P and 2g of impurity G. Describe the procedure to purify P if G is insoluble in water.

**chemistry**

A solid substance P is soluble in water (1g/100 mL) at 25 degrees and 10g/100mL of water at 100 degrees. You are given a sample that contains 10 g of P and 2g of impurity G. If G has the same solubility as P, describe how you could purify P.

**Arrays and Expanded Algorithm**

how do you 4th grade kids do arrays and an expanded algorithm math fpr homework

**literary**

what literacy device is used in the statement? former indonesian president suharto was sometimes referred to as a puppet master.

**math HELP!!**

help

**math**

writing numbers in standard form ex 624

**Math 6**

What is the expanded form using powers of 10 and using exponents of 7,375?

**Math 6th grade**

42.1

**MAth**

ONE DIRECTION

**Mathematical Applications**

For the life of me, I cannot understand this question! Will someoe please help me, explain to me how I can solve it, PLEASE! Q- a party supplies store recorded net sles of $423,400 for he year.The store's beginnng iventory at retail was $105,850 andits ending inventory at ...

**5TH grade math**

estimate each sum or differnce. 7.4 + 3.1+ 9.8 How do I do this?

**Math**

A box in the shape of a rectangular prism has a volume of 56 cubic inches. If the length of each side is multiplied by 2, what will be the approximate voume of the resulting box?

**math**

thousands

**Math**

coach byrd gives 7 lessons a day . how many days will it take him to give 100 lessons? please HELP!!!

**math**

The length of the smaller rectangle at the right is 1 inch less than twice its width. Both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. The area of the shaded region is 86 square inches. What are the dimensions of the smaller rectangle?

**Nassau**

The length of the smaller rectangle at the right is 1 inch less than twice its width. Both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. The area of the shaded region is 86 square inches. What is the area of the larger rectangle?

**algebra**

I don't understand how to do this problem. Please help! Find an exponential function of the form f(x) = bax that has a y-intercept of 2 and passes through the point (2, 98). For example, if the equation is f(x) = 2(7)x respond by entering the answer as 2(7)^x

**math**

the washing ton monument is 555ft tall. which is closest to its height? i know the answer is 180 but i do not know how to show work for it!!!HELP!!!

**science**

How does your body keep from being crushed from air pressure?

**algebra**

I need help understanding how to do these problems. Thanks! 1) Find the value(s) that would be left out of the range of f. If there is more than one value separate them by commas. Leave fractional answers in fraction form. If there are no values left out of the range respond ...

**algebra**

How would you go about solving this? Im totally confused. Thanks! Find the value of k such that the graph of f contains the given point. Write k as a simplified fraction if it is not a whole number. f(x) = kx^3 - 3x^2 + kx + 3; (-1, 8)

**chemistry**

Calculate how many grams of Cu are needed to produce 15L of NO(g). Please help

**Chemistry**

How many mL of Water are made from 4 moles of HNO3?

**history**

describe how greek philosophers were different from those that existed in other ancient civilizations. HELP!!!!!!!!!!!!!

**geometry**

what are the numbers??? otherwise can"t help

**algebra**

i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 + y^2 = 25 x - y = 7 3) ...

**Calc**

-4/45 amp/sec

**algebra**

A=0.5h^2+2h;30ft^2

**Chemistry**

228.46 / (5510/5471) = 226.84

**History**

What was the second most big city state in greece. now the first is sparta but what is the other!!!

**measurments**

how long is a five k????? Is it 5 kilometers or 5 miles??

**algebra**

48/p=12. got 576 but not one of the answer chices(p=6,p=36,p=4,p=60 are the choices)

**math**

X+(X-1)+(2X-5)=24 use X for the amount of outfits Jane has. you know: -that Charlie packs 1 less than Jane (x-1) -that Loretta packs 5 less than twice Jane's (2x-5) -that you can't have more than 24. so set it equal to 24 and then solve :)

**math**

there are 12 inches in a foot. so divide 5040 by 12 and it should give you the correct number

**math**

3x+5y-6=0 solve for y

**Calculus**

a=-0.7650 b=-0.4809

**Spainish**

Would mi amigos be nostros or ustedes.

**goverment**

According to my U.S. Government textbook, historian Fredrick Jackson Turner believed democracy came from the circumstances in which the colonists found themselves.

**analogies**

Spruce

**calculus**

Find the derivative of the following functions: x^7+2/(x^1/2) also (x^9-x^1/7)7^x

**Calculus**

Find the quadratic polynomial g(x)=ax2+bx+c which best fits the function f(x)=7x at x=0, in the sense that g(0)=f(0), and g'(0)=f'(0), and g''(0)=f''(0).

**Calculus**

On what intervals is the function f(x)=x^7−7x^6 both decreasing and concave up?

**math**

i still don't get the anwser but thanks anyway ! :)

**math**

5 is to 8 as 15 is to (blank) ?

**Chemistry**

A sample of nitrogen gas occupies 1.55 L at 27oC and 1 atm pressure. What will the volume be at -100oC and the same pressure?

**Calculus**

Correction: f(x)=ax^n

**Calculus**

Given a power function of the form f(x)=axn, with f(3)=20 and f(9)=1620, find n and a

**Calculus**

I meant to put x^7-7x^6

**physics**

The three ropes are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown: F=85 N, q=54°. What is the magnitude of the tension force in the first rope

**History**

I need four topics to compare and contrast Machiavelli's The Prince and Castiglione's The Courtier. Thanks.

**Social studies**

What are the names of the nations in central america?

**calculus**

Thank you!

**calculus**

Factor completely x^3 - 5x^2 - x + 5

**trig/functions**

what does y=2 sin (x-pi/ .5) -1 look like on a graph with the 3 phases of the function?

**calculus**

Suppose that the sales at Borders bookstores went from 70 million dollars in 1989 to 415 million dollars in 1993. What is the continuous percent growth rate, per year, of sales?

**math**

Using the formula for the area of a triangle, A = 1/2 bh, find the area of this triangle pictured. The base is 2x + 16 and the height is 4x. I just don't know how to work the problem.

**5th grade math**

hey i don't like math at all so i was wondering if you can do this below CONSTRUCTING A GRAPH FROM LANDMARKS mode:15 minimum:5 median:10 maximum:20 and i don't even know where to start

**Chemistry**

its 112g because if you need a total of 200 and they already tell you that the co2 is 88, then subtract 88 from 200 to get 112

**Life Sciene**

How would the cell theory be affected if scientists could make living cells from carbon, oxygen, and other elements found on earth.

**fractions**

Mr.shafier has been teaching school for 10 years.For 6 of those years he taught 8th grade.what fraction represents the time Mr.shafier has not been teaching 8th grade?I knoe the answere is 2 5ths. but how do i show work?HELP!!!!!!!!!!!!!!!

**physics**

A 250 kg car starting from rest is pushed 30m. When the car reaches 30m, it’s traveling at a speed of 12m/s and it encounters 52N of friction. What is the acceleration of the car and what is the force of the push on the car?

**Science (6th grade, but actual 7th grade paper)**

The long ramp bc more potential energy

**math**

did you know when you try to find the least commen multiple of 3 numbers you have to divide by two after you get your answer my class (ms.lott in texas) told us that for some reason its doubling the number so always divide by two once you have crossed out the commen numbers ...

**Chemistry**

help please! At 2200°C, K = 0.050 for the following reaction. N2(g) + O2(g) 2 NO(g) What is the partial pressure of NO in equilibrium with N2 and O2 that were placed in a flask at initial pressures of 0.75 atm and 0.30 atm, respectively?

**Chemistry**

help please! At 5000 K and 1.000 atm, 83.00% of the oxygen molecules in a sample have dissociated to atomic oxygen. At what pressure will 99.0% of the molecules dissociate at this temperature?

**geometry**

What does it mean by a line being unique?

**1st grade**

I ran past the dog and the cat who were fighting

**ap calculus**

A particle moves along a straight line with displacement s(t), velocity v(t), and acceleration a(t). Show that a(t) = v(t) dv/ds.

**math**

If i need 2-1/4 cups of flour for 12 people then how much do i need for 10 people?

**college english**

Nothing comes up with that search.

**college english**

I need help figuring out what this poem means. Thanks Analysis of a Sound in the Middle of the Night by Nicole Brossard time free-falling in my arms, I await night the midpoint of midnight life stretches out palm tree silence unrecognizable in the folds of representation I ...

**physics**

A merry-go-round in the park has a radius of 1.8 m and a rotational inertia of 900kgm^2. A child pushes the merry-go-round with a constant force of 80 N applied at the edges and parallel to the edge. A frictional torque of 12 Nm acts at the axle of the merry-go-round. a. what ...

**algebra**

what is twice a certain number is 44. What is the number abeka. 7th grade.

**Chemistry**

What mass of electrons would be required to just neutralize the charge of 3.9 grams of protons?

**8th grade**

is it a flip flop

**physics**

If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?

**physics**

what does hi mean ?

**physics**

If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?

**physics**

If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?

**Chemistry**

A sulfur-containing compound is decomposed and the products are collected over water according to this equation: SxOy -> SO2(g) + O2(g) The mole fractions for the products are as follows: SO2 (.8) and O2 (.2) What is the empirical formula for the original compound?

**Calculus ll - Improper Integrals**

Oh! I understand now. The "total area" part kind of threw me off. Thank you so much!

**Calculus ll - Improper Integrals**

Find the area of the curve y = 1/(x^3) from x = 1 to x = t and evaluate it for t = 10, 100, and 1000. Then find the the total area under this curve for x ≥ 1. I'm not sure how to do the last part of question ("find the the total area under this curve for x &#...

**Chemistry**

Write out the general equation: NaCl(aq) + AgNO3(aq) ---> AgCl(s) + NaNO3(aq) Write out the total ionic equation. If it's a strong electrolyte, it is written as ions. If not, it's written as a molecule. NaCl, AgNO3, and NaNO3 are strong electrolytes, so they're ...

**statistics**

did you ever find this answer?

**Physics**

Determine the magnitude and direction of the displacement if a man walks 32.5 km 45° north of east, and then walks due east 19.5 km.

**science**

how is gravity related to falling objects

**6th grade**

Im having trouble with my Reading.If any of you have any help.with me please do bc i hate Reading and it is very hard for me.I'm in all honors.PLEASE HELP!!!

**MATH**

the answer is correct it would be 11 hotdogs

**math**

LOL i shoud konw this im in 10 grade (:

**math**

rebecca has 6 pencils

**math**

2.4

**Math**

I am very confused with rounding off numbers. How do you know how many zeroes shall you put when you retain?

**Communication and Gender Studies**

Yea, aren't all the questions teachers ask of us!

**Communication and Gender Studies**

That's the question. I am not sure. I think it depends upon the individual. What do you think?