# Questions Asked onJanuary 31, 2013

Will somebody please help or translate these. Thank You 4. Which expression is used to talk about what you have just done? venir de hacer la tarea hacer un viaje acabar de 5. Vengo de la clase. ¿Qué acabo de hacer? Acabas de bailar. Acabas de bailas.

2. ## Algebra

Suppose a linear system of equations has 2012 equations and 2013 unknowns. Answer the following questions:  Can the system be inconsistent?  Can the system have a unique solution?  Can the system have infinitely many solutions?

3. ## Differential Equations

Consider the differential equation: dy/dt=y/t^2 a) Show that the constant function y1(t)=0 is a solution. b)Show that there are infinitely many other functions that satisfy the differential equation, that agree with this solution when t0 [Hint: you need to

4. ## calculus 2

A tomato is thrown upward from a bridge 23 m above the ground at 40 m/sec. find acceleration, velocity, and height of tomato at time t. How high does the tomato go, and when does it reach its highest point?

5. ## Calculus

If f(x)=sqrt(14x) a)find f' (x) b) find f'(4)

6. ## Calculus

If f(x)=[(6x^3)-3]/x^4 a)find f' (x) b) find f'(4)

7. ## calculus 2

If a car goes from 0 to 100 mph in six seconds with constant acceleration, what is that acceleration?

8. ## Calculus

Let f(x)= 6x+(4/x^2). then the equation of the tangent line to the graph of f(x) at the point (2,13) is given by y=mx+b. What is m and what is b?

9. ## Calculus

Let f(x)=5x^(1/4)(x^3-10). Evaluate f'(x) at the following points: a) f'(3) b) f'(5)

10. ## calculus 2

An object thrown in the air on a planet in a distant galaxy is at height s(t) = -20t^2 +67t +42 feet at time t seconds after it is thrown. a) From what height was the object thrown? b) With what velocity was the object thrown? c) What is the acceleration

11. ## Differential Equations

For the following initial value problem: dy/dt=1/((y+1)(t-2)) a)Find a formula for the solution. b) State the domain of definition of the solution. c) Describe what happens to the solution as it approaches the limit of its domain of definition. Why can't

12. ## calculus 2

An object falls off a 400-foot tower. With g=32ft/sec^2, as at the Earth’s surface, the object would hit the ground after 5 seconds. What would the acceleration due to gravity have to be to make it reach the ground in half the time?

13. ## math

the largest value of n for which 10^n evenly divides 2^9*15^2*35 is a)2 b)3 c)4 d)5 e)6

14. ## Physics

A proton collides head on with a helium atom at rest. Their combined velocity after the collision is 8 x 10^5 ms^-1. Calculate the initial velocity of the proton. *** HELP PO PLEASE!!

15. ## Physics

A proton collides head on with a helium atom at rest. Their combined velocity after the collision is 8 x 10^5 ms^-1. Calculate the initial velocity of the proton. *** HELP PO PLEASE!!

16. ## Physics

A proton collides head on with a helium atom at rest. Their combined velocity after the collision is 8 x 10^5 ms^-1. Calculate the initial velocity of the proton. *** HELP PO PLEASE!!

182. ## math8

20-(12-x)=38 and 5(3c-c)+3=43

183. ## Math

If Im naming fractions are these fractions in the right order from least to greatest? 1/4 1/3 1/2?

184. ## algebra

Solve the equations symbolically. 3x+7/4 + 3x-7/5 =-8/5 6(7x-1)+5=24+3x How do I go about solving them?

185. ## Logarithms (math)

how do you solve for x 3.4e^(2-2n)-9=-4 I don't know what is the step by step process. Help please!

186. ## science

what are the steps of the scientific method in order?

187. ## Physics

Two identical balls each have a charge of -7.5x10^-6C. The balls hang from identical strings that are 8‹ from the vertical because of the repulsive force between the charged balls. The balls are separated by a distance of 10cm. What is the tension in

188. ## Math

From least to greatest would it be 1/8 1/6 1/4 1/2?

189. ## math

alexs family ate 1 7/8 pizzas for dinner.which shows this mixed number written as a fraction greater than one?

190. ## math

Identify the solution(s) of the system of equations, if any. x=1 y=1 I think it is C but not 100% sure.... just seems to easy a) no solutions b) (0,0) c) (1,1) d) infinitely many solutions

191. ## math

Complete the division sentences and then write a full multiplication equation. (#5) 5 ÷ 1/7 = (#6) 4 ÷ 1/8 = Please help me.

192. ## physics

A light bulb is placed 17.1 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 6.60 cm closer to the mirror. Calculate the focal length of the concave mirror.

193. ## Physics

A soccer ball is released from the top of a smooth incline. After 3.80 s the ball travels 9.1 m. One second later it has reached the bottom of the incline. Assume the ball's acceleration is constant and determine its value ( m/s2)

194. ## math

the product of three consecutive integers is 22 less than the cube of the middle integer. Find the integer.

use a table and play money to solve the problems. item prices: postcard($1.13), keychain($3.87), park ranger patch($5.33) and stuffed animal($8.79). Jamie spent $5.00 on postcard and key chain, Darla sepent$9.20 on park ranger patch and key chain and

196. ## math

Write a number story for the expression, and solve it. 3 ÷ 1/4 = Please help me.

197. ## Physics

Two sinusoidal waves with the same amplitude of 9.11 mm and the same wavelength travel together along a string that is stretched along an x axis. Their resultant wave is shown twice in the figure, as valley A travels in the negative direction of the x axis

198. ## Organic Chemistry

Why is the melting point of a known compound (ex. acetanilide) determined before the melting point of the unknown compound? I think it is to determine if the unknown is a pure substance but I am not sure..I just need to be pointed in the right direction.

199. ## Geometry-8th gr

IF 3a =2b and 4b=9c, find the ratio of a to c in simplest form and show steps.

200. ## Physics

Two sinusoidal waves with the same amplitude of 9.11 mm and the same wavelength travel together along a string that is stretched along an x axis. Their resultant wave is shown twice in the figure, as valley A travels in the negative direction of the x axis

201. ## Geometry-8th gr

The geometric mean x of two numbers is the positive value of x that satisfies the proportion a/x =x/b, where a and b are given. Find the geometric mean of 16 and 9.

202. ## math

A square table with an area of 25 sq ft is pushed together with a rectangular table with an area of 40 sq ft. What is the perimeter of the new table?

204. ## Math

Gracie pattern of increasing perfect squares is shown 25,36,-------,64,81,100. What number does she need to to square to find the missing term? 5, 6,7,8

205. ## math

The question states: Plot the regression line from D = 40 to D = 300. My question: Do you extend the line beyond those 2 points (as in going towards the axis) or does the regression line just connect those 2 points like a line segment?

206. ## Macroeconomics

If the economy is at point C what is the cost of one more automobile? One more forklift?

207. ## Science - Waves - Sci. Notation

I know that the formula to calculate the speed of light is c=fλ. F is the frequency, c is the speed, and λ is the wavelength. So how do I calculate the wavelength of a purple light with a frequency of 750 * 10^12 HZ. Frequency is measured in HZ. The

208. ## Physics

Two pendulums are set up side by side. One pendulum P, consists of a 0.240 kg mass that is suspended on a string that is 65.0 cm long. The other pendulum, Q, has a 0.360 kg mass that is suspended on a string that is 39.0 cm long. The two masses are pulled

209. ## Probability

A number cube has six faces numbered 1 to 6. John tossed two number cubes several times and added the number each time.

210. ## Physics

A block of wood (10-kg) at rest is hit by a bullet (50-g) that embeds itself in the block and causes both to now move at 2.7-m/s eastward. What is the initial velocity of the bullet?

211. ## Math

Find the area for the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the radius is 23 yd 22. Find the circumference of the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the raduis is 23 yd

212. ## Math

Carl has three lengths of cable,5/6 yard long,1/4 yard long and 2/3 yard long.he needs at least one yard of cable. Which two pieces together Make a k Length at least 1 yard and closest to one yard

213. ## math

What is equivalent to 11/22

214. ## math

What is equivalent to 11/22

215. ## math

Explain how you can use multiplication to find the perimeter of a square

216. ## Help me

11. Name the triangles that are classified by angles. right, scalene, isosceles scalene, isosceles, equilateral acute, right, obtuse obtuse, isosceles, acute 12. Classify the triangle by side length and angle measurement. scalene, acute isosceles, acute

217. ## MATH

PAM HAS A BOX IN THE SHAPE OF A RECTANGULAR PRISM. THE HIGHT IS 14 1/2 INCHES, THE WIDTH IS 6 1/2 INCHES AND THE LENGTH IS 10 1/2 WHAT IS THE VOLUME OF THE BOX?

6.9kg/m3

219. ## Averages

Find the average. 39, 47, 52 I got an answer of 46. Is this correct?

220. ## Physics

If a 60 kg meteor falls to earth from a great distance. How much gravitational potential energy does it lose? (the energy PE is 0 at a great distance). What happens to this potential energy? Final-Initial=-Gmm/r-0=change in energy

2(n+3}

271. ## Math

The area of a rectangle is 12 and the width is 3/4 the length. What are the dimensions?

272. ## math

cynthia ate 1/4 of the pizza. if the pizza has egiht slices how many slices left?

273. ## History

"They [Jackson and his supporters] see nothing wrong in the rule that to the victor belong the spoils of the enemy." -William Learned Marcy of the U.S. Senate What did Marcy mean by the "spoils of the enemy"?

274. ## Physical Science

What is the acceleration of a car that moves from rest to 15.0m/s in 10.0s ?

275. ## Simple Math

Two eight-sided number cubes are thrown. Given that one of the cubes shows a five, what is the probability that the sum of the numbers that come up on the two cubes is six?

276. ## Soanish

How do you say i spanish: "The hospital is far from the house" Thank You

277. ## Spanish

How do you say this in spanish: "The resturant is next to the supermarket" Thank you I think it's like this: El restaurante está al lado del supermercado.

278. ## Spaish

How do you say this in spanish? "I have just ate" I thnk it's like this- "Acabo de comer" How do you say this in spanish? "We have just danced" I think it's like this- Acabamos de bailamos. Thank You

279. ## calculus

f(x) = (3x^3+5x^2+8x-8)/x find the derivative

280. ## world history

what page can i find "Hoe Ana on in our world by macmillan/mcgraw-hill

281. ## Physics

Small spheres of diameter 1.00mm fall through 20 degree Celsius water at a terminal speed of 1.10 cm/s. calculate the density of the spheres.

282. ## trig

cos(+pi/2-theta)/csctheta+cos^2theta

283. ## math

The longer base of an isosceles trapezium is 20 cm, its legs are 10cm. The legs of the trapezium are extended by 8 cm long to gain an isosceles triangle.Find the shorter base of the trapezium. Please help me:)

284. ## ??/

1. Oxygen moves easily out of blood capillaries into cells because ___________. (1 point) the walls are very thin because it is very small because other gases push it out cells need the oxygen 2. Which of the following statements is false? (1 point)

285. ## physics

The body of a 1258 kg car is supported on a frame by four springs. The spring constant of a single spring is 1.31 × 104 N/m. Four peo- ple riding in the car have a combined mass of 230 kg. When driven over a pothole in the road, the frame vibrates and for

286. ## Pre-Alegebra

You spin a spinner that is divided into 6 equals parts once and roll the number cube once. Find the probability that the spinner stops on the same number that you roll the number cube?

287. ## government

five purposes of govt...protection,order,conflict resolution,econ. stabilty and public services....provide example of govt. that fulfills each purpose... I really don't about conflict resolution and econ. stability...Thank you

288. ## math

If pump A and pump B work together, they can fill a pool in 4 hours. Pump A, working alone, takes 6 hours to fill the pool. How long would it take pump B, working alone, to fill the pool?