# Posts by sammy

Total # Posts: 695

**Math PLEASE HELP!!!**

A contractor pours a sidewalk that is 4 inches deep, 1 yard wide, and 20 yards long. How many cubic yards of concrete will be need? (Hint: 36 inches = 1 yard)

**Math PLEASE HELP!!!**

A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4) No one has answered

**Math I REALLY NEED HELP!!!!!!!!!**

A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4)

**Math I REALLY NEED HELP!!!!!!!!!**

Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20

**Math**

Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20

**Math**

Joe pick 112

**Biology- please help :)**

I been trying to figure out if my answers were right to with no luck! I have read so much and the wording is throwing me off bad. Just few words different and I'm flustered

**Math**

John has 11 more quarters than dimes. He has a total of $7.65. How many quarters and dimes does he have?

**Math (trigonometry)**

MONDAY December 3, 2012 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th...

**Math (trigonometry)**

From the top* of a cliff, not from the drop of a cliff.

**Math (trigonometry)**

From a boat on the water, the angle of elevation of the drop of a cliff is 31°. From a point 300 m closer, the angle of elevation is 33°. Find the height of the cliff. the answer should be 2411 m. I had tan31° = h/x+(x-300) tan33° = h/x-300 -> (x-300)tan33&...

**Math (trigonometry)**

How do you get the second triangle when you have an ambiguous case of sine law? For example, if you are given the following information for a triangle: a = 7.2 mm, b = 9.3 mm, <A = 35° I can solve for one triangle: Find <B, <C, side c. <B: sinB/9.3 = sin35°...

**Math (trigonometry)**

But in the triangle I was thinking of/the one I drew, the mountain is inside triangle ABC...? I don't really understand why I would have to take the supplementary angle of 22.3; I'm not disagreeing with you, I can see that you're right, I just don't understand ...

**Math (trigonometry)**

Sorry, a) should say, "calculate the distance to the top of the mountain from point A," not point B.

**Math (trigonometry)**

A surveyor wishes to find the height of a mountain. He selects points A and B on level ground along the same line of sight to the mountain. He measures the distance AB to be 1503 m and the angles of elevation of the top of the mountain from the points to be 16.9° from A ...

**Math 8R**

You're welcome.

**Math 8R**

The square root of 1/16 is 0.25 which is a real number. When the number under the square root is negative , that's when you have a number that is not real.

**Math 8R**

Sorry, completely misread the order of the letters. No, b is correct. Because 13/0 is undefined.

**Math 8R**

Yes.

**Math (trigonometry)**

Oh! Wait, sorry, again. Never mind. That was really stupid of me. I don't know how I didn't see it, but I realise what was wrong now, thank you

**Math (trigonometry)**

Oh, never mind about not being able to visualise your proof at the end, I completely misread that, wow. But my diagram is still incorrect somehow because 27.4 is the adjacent side..

**Math (trigonometry)**

I think I may need to rethink this question because in the diagram I drew, 27.4 m is adjacent to the 45° angle. And the proof you showed me at the end cannot be visualised in my diagram.. Would it be possible for you to explain in words (I know it's really hard..) what...

**Math (trigonometry)**

A baseball diamond is actually a square with each side approximately 27.4 m. The pitcher's mound is 18.4 m from home plate on the diagonal of the square - note that the pitcher's mound is NOT located at the centre of the diamond! a) How far (to 3 decimal places) from ...

**Math**

no problem sorry again have a nice day =)

**Math**

ohh Sorry :( my bad

**Math**

Maybe.

**Math**

I think Side 2? I think. Your Welcome :)

**math**

7.9% Is the Answer :-)

**Spanish III**

1. comenzar ---> 1. start 2. practicar ---> 2. practice 3. jugar ---> 3. play 4. almorzar ---> 4. lunch 5. tocar ---> 5. touch 6. buscar ---> 6. search 7. llegar ---> 7. get 8. pagar ---> 8. pay 9. cruzar ---> 9. cross 10. empezar ---> 10. Start

**Trigonometry**

How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.

**Math (trigonometry)**

Didn't you just factor that? (perfect square trinomial) I'm looking for a way to solve it without factoring..

**Math (trigonometry)**

How do you solve this trig identity problem without factoring? I just used @ to represent theta: sin^4@ + 2sin^2@cos^2@ + cos^4@ = 1

**math**

No, because 3x_ can NEVER equal to 16 so 16 divided by 3 has no answer. There will be one left out.

**Physics**

A 35 kg box rest in the bed of a truck. The coefficient of static friction between the box and the truck bed is 0.30 and the coefficient of friction of kinetic friction is 0.10. A) Calculate the maximum acceleration the truck can have before the box slides backwards. B) The ...

**Physics**

How do you know how long you need to draw the vectors? Like if the gravity vector line is longer than the normal force, or if the friction line is longer than the applied force or whatever..?

**Physics**

The maximum force a grocery sack can withstand and not rip is 250 N. Calculate the greatest acceleration 20 kg of groceries can be lifted from the floor to the table such that the sack does not break.

**physics**

A 59.0-kg skater is traveling due east at a speed of 1.80 m/s. A 61.0-kg skater is moving due south at a speed of 6.20 m/s. They collide and hold on to each other after the collision, managing to move off at an angle south of east, with a speed of vf. Find (a) the angle and (b...

**Science**

Can you tell me specifically why this is so??

**Science**

huh?

**Science**

Why are aboriginal clan systems considered a human social system?

**physics**

A satellite circles the earth in an orbit whose radius is 2.01 times the earth's radius. The earth's mass is 5.98 x 1024 kg, and its radius is 6.38 x 106 m. What is the period of the satellite?

**Math**

If the length of the hour and the minute hands of a clock are 4 cm and 6 cm, respectively, what is the distance in cm between the tips of the hands at two o'clock?

**physics**

Two separate seismograph stations receive indication of an earthquake in the form of a wave traveling to them in a straight line from the epicenter and shaking the ground at their locations. Station B is 60 due east of station A. The epicenter is located due north of station A...

**physics**

Ilya and Anya each can run at a speed of 7.80 and walk at a speed of 3.20 . They set off together on a route of length 5.00 . Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half. Part A How long does it take Anya ...

**physics**

A boy throws a stone straight upward with an initial speed of 12.0 Part A What maximum height will the stone reach before falling back down?

**physics**

Four identical masses of 3.5 each are located at the corners of a square with 1.8 sides. Part A What is the net force on any one of the masses?

**physics**

Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force . (Figure 1) The magnitude of the tension in the string between blocks B and C is = 3.00 . Assume that each block has mass = 0.400 . Part A What is ...

**physics**

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . When a horizontal force of 340 is applied to a 68.0 box, the box slides on a level floor, opposed by a force of kinetic friction of 150 . Part A What is the magnitude of the ...

**physics**

A 125 object is taken to a height of 210 above the Earth's surface. Part A What is the object's mass at this height? Part B What is the object's weight at this height?

**physics**

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8 . A hockey puck with a weight of 0.80 is sliding freely across a section of very smooth (frictionless) horizontal ice. Part A When it is sliding freely, how does the upward force of the ...

**physics**

A Superball is dropped from a height of 2.4 and rebounds off the floor to a height of 1.9 . Part A If the ball is in contact with the floor for 0.70 , determine the direction of the ball’s average acceleration due to the floor. If the ball is in contact with the floor for...

**physics**

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A block of mass 23.0 slides down a frictionless surface inclined at 35. Part A To ensure that the block does not accelerate, what is the magnitude of the smallest force that you must ...

**physics**

During liftoff, a hot-air balloon accelerates upward at a rate of 2.5 . The balloonist drops an object over the side of the gondola when the speed is 12 . a)What is the magnitude of the object’s acceleration after it is released (relative to the ground)? Part B What is ...

**physics**

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A 3000 truck tows a 1500 car by a chain. Part A If the net forward force on the truck by the ground is 3500 , what is the acceleration of the car? Part B What is the tension in the ...

**physics**

A bullet traveling horizontally at a speed of 350 hits a board perpendicular to its surface, passes through and emerges on the other side at a speed of 230 . If the board is 3.80 thick, how long does the bullet take to pass through it?

**physics**

At the Indianapolis 500 time trials, each car makes four consecutive laps, with its overall or average speed determining that car’s place on race day. Each lap covers 2.5 (exact). During a practice run, cautiously and gradually taking his car faster and faster, a driver ...

**physics**

A regional airline flight consists of two legs with an intermediate stop. The airplane flies 380 due north from airport A to airport B. From there, it flies 260 due east to its final destination at airport C. Part A What is the magnitude of the plane’s displacement from ...

**physics**

The acceleration due to gravity near a planet's surface is known to be 3.20 . Part A If the escape speed from the planet is 9.54 , determine its radius. Part B Find the mass of the planet. Part C If a probe is launched from its surface with a speed twice the escape speed ...

**math**

twelve less than a number is 19. what is the number?

**Physics**

Using T-charts A marble it dropped from a stair well that is 4.3 m high. (a) How long will the marble be in the air for? (b) What speed will it be traveling at as it hits the ground?

**Physics**

If it takes 2.37 seconds for a stone to hit the ground from a cliff. (a) From what height was the stone dropped from? (b) What is the stones final velocity when it hits the ground?

**college stat**

Use the graphic to show the sampling distributions of means for the sample from Prison A (n=82) and the sample from Prison B (n=37). Mark the expected value of the mean and the standard units. Shade in the critical zone for alpha = .05.Locate each sample mean after you have ...

**Calculus**

Thank you so much!!!!!

**Calculus**

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=5x^(1/2) , y=4 and 2y+1x=6 I've been trying this problem for about 3 hours. Please help!!!!!

**MATH**

Solve the following system of equations for the unknown variables. a + b = 7 a + c = 12 b + c = 15

**Precalculus**

If Sin A=3/5 and cos B= -12/13, find the value of sin(A-B) if Angle A is in Quadrant I and angle B is in Quadrant III.

**Physics help please!**

A cylindrical metal can with a radius of 4.25 cm is floating upright in water. A rock is placed in the can, causing it to sink 0.0230 m deeper into the water. What is the weight of the rock?

**Spanish-Thank you**

Thank you Ms. Sue for sending this-I'll check back later to see if there is an answer

**Spanish-Please check if I answered these correctly**

¿Cuando te cepillas los dientes? Me cepillo los dientes por la mañana. ¿Qué puedes encontrar en tu ciudad o pueblo? Puedo encontrar un parque. ¿Qué vas a hacer con tu familia cuando vas de vacaciones? Quiero a ir a la playa en Hawaii ...

**AP Biology**

In 1918 a particularly virulent strain of influenza (an RNA virus) wiped out millions of health humans in the prime of their lives. Epidemiologists fear that such a super bug could revisit us in the future. And thus there was quest to find samples of the virus, and make a ...

**Math**

A company that produces a particular machine component has 3 factories, one each in Buffalo, Detroit, and Pittsburgh. 39% of the components produced come from the Buffalo factory, 36% of the components come from the Detroit factory, and 25% of the components come from the ...

**physics**

1/di could also be written 2/2di then if you take away 1/2di you are left with 1/2di. It's like saying 1 minus 1/2 equals 1/2

**Algebra 2**

Write a rule for the nth term of the arithmetic sequence. ( I'm not sure how I'm suppose to write the numbers below a :C so bare with me ) a(2) = - 28, a(20) = 52 I used the formula a(n) = a(1) + ( n-1)d a(20) = a(1) + (20-1)d > 52 = a(1)+19d a(2) = a(1) + (2-1)d &...

**Math(alg2)**

solve the exponential equation 5(2)^2x - 4 = 13 thanks

**science**

a car starts from a stopped position at a red light at the end of 30 second its speed is 20 meters per second what is the acceleration of the car

**chem**

How much heat is required to heat 0.1 g of ice at −30 degrees C to steam at 100 degrees C

**chem**

The standard molar heat of vaporiza- tion for water is 40.79 kJ/mol. How much energy would be required to vaporize 2.54 ×1010 molecules of water? Answer in units of kJ

**physics**

If a wheel 211 cm in diameter takes 2.25 s for each revolution, find its period. T=?s

**Chemistry**

Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide. Sb2S3(s) + 3Fe(s) ---> 2Sb(s) + 3FeS(s) When 15.0 g Sb2Sb3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this reaction?

**Spanish-9th gradePlease check**

Thank you

**Spanish-9th gradePlease check**

Thank you very much

**Spanish-Please check SraJMcGin if possible-9th gradePlease check**

I'm not sure if SraJMcGin is still answering questions but I would appreciate her checking this if she still does Thank you

**Spanish-9th gradePlease check**

I have a question-I have to write the verb correctly for these two sentences Did I do them correctly? 1. nosotros/lavarnos Nosotros nos lavamos. 2. yo/ponerme Yo me pongo.

**PreCal**

Projectile Motion: An object is propelled upward at an angle theta, 45 degree < theta <90 degree, to the horizontal with an initial velocity of v0 feet per second from the base of an inclined plane that makes an angle of 45 degree with the horizontal. If air is ignored, ...

**PreCal**

Angel of Elevation: You are skiing down a mountain with a vertical height of 1500 feet. The distance from the top of the mountain to the base is 3000 feet. What is the angle of elevation from the base to the top of the mountain? Traveling at 25 miles per hour, how long does it...

**English**

Connections does not give you enough resources and their lessons you pull up and a joke. they aren't even that good and informative. Everything is click here go there ad half the time it doesn't work. I hate not having an actual book in front of me. Not digging ...

**spanish**

Adonde vas despues de comer?

**Economics**

so D?

**Economics**

If the government announced the economy is headed into an expansionary period of rising real GDP and prices, businesses would most likely respond by: a. lowering wages so that they could afford to hire more workers b. dismantling some of existing production facilities c. ...

**Mnagemeny**

I need assistance with a problem. can anyone help?

**Math**

543

**Math**

Change them all to the same denominator. The common denominator is 120

**math**

600 times .06 times 12. Add this answer to 600.

**algebra**

m to the second

**algebra**

There is no answer. You cannot divide by 0.

**Algebra 2**

P=the principal ( the amount borrowed) R=the rate(percent) T=time the amount is borrowed I=interest You must multiply P R T together to get the interest

**ENGLISH**

PLEASE HELP !! Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. 1.Robert was successful because his planning paid off 2.Tim said he ...

**english**

Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. That was a very long phone call.

**physics**

The coefficient of static friction between the 3.0 kg crate and the 31° incline shown below is 0.300. What is the magnitude of the minimum force, F, that must be applied to the crate perpendicularly to the incline to prevent the crate from sliding down the incline?

**Spanish**

If I wanted to say "Those butterflies are the prettiest of all." would I say this sentence or should the "esas" be "estas"? Esas mariposas son las más bonitas de todas las mariposas