Sunday

January 22, 2017
Total # Posts: 249

**SAT MATH**

In the xy-plane, line m passes through the origin and is perpendicular to the line 8x-3y=n, where n is a constant. If the two lines intersect at the point (r, r-2), what is the value of r?

*January 2, 2017*

**Math (SAT)**

The function f is defined by f(x)=2x^3-x^2+kx-6, where k is a constant. In the xy-plane, the graph of f intersects the x-axis at the three points (3,0), (-1/2,0), and (q,0). What is the value of k?

*December 29, 2016*

**Statistics**

A youth group has 7 boys and 5 girls. Experiment is select 5 people at random from the group. Let X be the number of boys in the selected 5 people. (a) Find the probability of exactly 1 boy, i.e., P([X = 1]). (b) Find the probability of exactly 2 boy, i.e., P([X = 2]). (c) ...

*November 16, 2016*

**Statistics**

Before a DVD player leaves the factory, it is given a quality-control check. The probability that a DVD player contains 0, 1, or 2 defectives are 0.90, 0.08, and 0.02, respectively. In a sample of 10 players, (a) Find the probability that 6 have 0 defects, 3 have 1 defect, ...

*November 16, 2016*

**Statistics**

Suppose that the probability that an item produced by a certain machine will be defective is 0.2. A sample of 12 items is chosen. Let X be the number of defectives among the selected 12 items. (a) Find the probability of at most 1 defective item. (b) Find the probability of at...

*November 16, 2016*

**Math**

What is 3÷3/4

*October 3, 2016*

**Chemistry**

I need help with this systhesis problem 1-propyne ----> 1.) 1 equivalent of NaNH2 2.)CH3CH2Br 3.) H2 Lindlar Catalyst 4.) HCl 5.)NaN3

*April 30, 2016*

**Orgo**

Draw a formula for the lowest molecular weight compound that contains C, H, and possibly O, N or S, is a chiral compound, contains ONLY one functional group, and is a chloroalkane.

*February 23, 2016*

**chemistry**

Draw the structures of the three primary (1°) amines with molecular formula C5H13N that contain five carbon atoms in a continuous chain.

*February 11, 2016*

**Chemistry**

Draw the structures of the three primary (1°) amines with molecular formula C5H13N that contain five carbon atoms in a continuous chain.

*February 10, 2016*

**chemistry**

What are the correct IUPAC names for triisopropylmethane and 2,2-dimethylcyclopentane?

*February 10, 2016*

**Chemistry**

What are the correct IUPAC names for triisopropylmethane and 2,2-dimethylcyclopentane?

*January 31, 2016*

**Honors Biology**

Elizabeth is married to John, and they have four children. Elizabeth has a straight nose (recessive) and is able to roll her tongue (dominant). John is also able to roll his tongue, but he has a convex (Roman) nose (dominant). Of their four children, Ellen is just like her ...

*December 9, 2015*

**Genetics/Bio**

In need of help for these two questions. Thank you in advance! Restriction Enzyme A has the recognition sequence 5′- CTGCAG -3′. Restriction Enzyme B has the recognition sequence 5′- GCGC -3′. Based on this information, you can infer that: A. Enzyme A ...

*December 1, 2015*

**Genetics/Bio**

In need of help for these two questions. Thank you in advance! Restriction Enzyme A has the recognition sequence 5′- CTGCAG -3′. Restriction Enzyme B has the recognition sequence 5′- GCGC -3′. Based on this information, you can infer that: A. Enzyme A ...

*November 29, 2015*

**Genetics/Bio**

RNA interference can repress proteins by all of the following mechanisms EXCEPT: a. promoting histone acetylation. b. promoting histone methylation. c. promoting mRNA degradation. d. blocking translation. The following are all examples of a histone modification EXCEPT: a. ...

*November 18, 2015*

**Algebra**

Sabrinia is building a rectangular raised flower bed. The boards on the two shorter sides are 6 inches thick, and the boards on the two longer sides are 4 inches thick. Sabrina wants the outer length of her bed to be 4 times its height and the outer width to be 2 times its ...

*November 17, 2015*

**Genetics/Bio**

Thank you for the help and explanations, Sam! Very much appreciated.

*November 8, 2015*

**Genetics/Bio**

Having a hard time with these two questions. Processing of ribosomal RNA (rRNA) includes all of the following EXCEPT: 1. snoRNA-dependent trimming. 2. snoRNA-dependent nucleotide modification. 3. snoRNA-dependent splicing. 4. snoRNA-dependent cleavage. tRNA molecules: 1. are ...

*November 8, 2015*

**chemistry**

a balloon filled with helium gas occupies 2.50 L at 25C and 1.00 atm. When released, it rises to an altitude where the temperature is 20C and the pressure is only 0.30 atm. Calculate the new volume of the balloon.

*September 28, 2015*

**physical science**

= (0.310)(8)(9.8*1.5)

*August 26, 2015*

**English**

Write a sentence using the words incessant and brief. This is my last one and I'm having trouble. Does this one sound okay? I prefer the brief disturbance of thunder to the incessant dripping of our kitchen sink.

*March 2, 2015*

**English**

1. Write sentence using obscured and revealed. 2. Sentence using compulsory and optional. 1. Heavy brush had totally obscured the entrance until someone cut away the branches and the entrance was revealed. 2. If your child hasn't met the compulsory vaccination requirements...

*March 1, 2015*

**English**

1. Which word is antonym of incessant? failing, brief or filthy brief

*March 1, 2015*

**English**

Yes I"m suppose to use each pair of words in a sentence.

*March 1, 2015*

**English**

What is an example of a sentence using the following pair of antonyms. 1, deficiency and surplus 2. replenished and emptied 3. alleviate and increase

*March 1, 2015*

**physics**

A 130 cm length of string has a mass of 3.94 g. It is stretched with a tension of 8.60 N between fixed supports. What is the wave speed for this string?

*February 1, 2015*

**Chemistry**

Last question I'm having trouble with. Predict the oxidation # for astatine. Why?

*December 15, 2014*

**Chemistry**

What is the difference in a polyatomic ion that has its name end in (-ate) as compared to one with the same central element that ends in (-ite)

*December 14, 2014*

**Chemistry**

Why is it hard to use the periodic table to predict the oxidation #'s of the transition elements?

*December 14, 2014*

**chemistry**

sodium hydroxide and carbonic acid net ionic equation

*December 5, 2014*

**chemistry**

potassium hydroxide and perchloric acid net ionic question

*December 5, 2014*

**Math**

an object is thrown upward from a height of 70 feet. t second after it is released, the object is h=-16t^2+40t+70 feet above the ground. how many seconds does it take until the object hits the ground?

*December 2, 2014*

**Math Help**

The answer would be B. To find perimeter of a square, the formula is P=4s. p= perimeter. 4= the four sides of the square. and S= side. which in this case it would be P=4*7

*November 20, 2014*

**Physics**

A ball rolls without slipping down the track as shown in the figure below, starting from rest at a height h1 = 27 m as shown. The ball is traveling horizontally when it leaves the bottom of the track, which has a height h2 = 8.0 m.

*October 16, 2014*

**Physics**

A bush baby, an African primate, is capable of leaping vertically to the remarkable height of 2.3 m. To jump this high, the bush baby accelerates over a distance of 0.14m while extending the legs. The acceleration during the jump is approximately constant. 1)What is the ...

*October 9, 2014*

**physics**

If a compressive force of 3.2×104N is exerted on the end of a 16cm long bone of cross-sectional area 4.4cm2 , by how much does it shorten? Use Ebone=1.5×1010N/m2, tensile strength of bone = 1.3×108N/m2.

*April 10, 2014*

**English**

The opposite meaning of Incongruity. A. Symmetry B. Arrest c. Opponent D. Abundance A

*February 5, 2014*

**Math**

Okay thank you for the suggestions

*January 14, 2014*

**Math**

Someone please help me figure this problem Given: Triangles ABC and BCD are isosceles, m∠BDC = 30°, and m∠ABD = 155°. Find m∠ABC, m∠BAC, and m∠DBC.

*January 14, 2014*

**Language**

1. Conservative:Liberal:: A. quiet:unemotional B. loved:trusted c. special:ordinary d. frozen:unchanging 2. Extend:Offer:: A. adapt:change B. light:close C. walk:run D. disrupt:dismay Choose pair of words that has a similar relationship to first pair of words. 1.c 2. d

*January 13, 2014*

**please help me!! with this science!!!!!**

4 is actually b

*January 7, 2014*

**Early Childhood Education**

Thank you so much Ms. Sue!

*December 11, 2013*

**Early Childhood Education**

so would the second one be A? and the 3 one B?

*December 11, 2013*

**Early Childhood Education**

Karen asked, "Where does rain come from?" The best response for her teacher is: A. "The clouds." B. "I don't really know, Karen." C. "How could we find out where rain comes from?" D. "That's really hard to understand, Karen...

*December 11, 2013*

**Blankinship**

How does the speaker in Marlowe's poem compare to the speaker in Raleigh's poem? A. Marlowe's speaker is more disenchanted B. Marlowe's speaker is more impulsive C. Marlowe's speaker is more ironic I think the answer is A.

*December 1, 2013*

**English**

disinterest discontent disavowal

*October 28, 2013*

**English**

1. The teacher's ____ made her an ideal judge at the tryouts. disinterest,dissent,disavowal,disagreement 2. My ___ with the class was due to the poor grade I received. disrespect, disavowal, discontent, disbelief 3. I sense your ___ with the project, but things will ...

*October 28, 2013*

**English**

Mark or cut slightly _ _ _ atch Large irregular spot or stain _ _ otch

*October 8, 2013*

**Math**

How would you solve for these word problems in one variable applications? 1.The maximum speed is allowed on main street is 25 miles per hour. 2. applicants must have at least 5 years of experience. 3 Ten less than a number,x, is greater than 32.

*September 25, 2013*

**chemistry**

a student burns a peanut in a calorimeter. she places 10 ml of water in a test tube. she weighs a peanut before and after burning it. It weighs 3 grams before and 1 gram after burning. She determines that the temperature was at 20 degrees C before and 70 degrees C afterwards. ...

*September 17, 2013*

**Math**

The area of a rectangle is 128 square feet. Its height is twice its base. Find the length of the height and the length of the base.

*September 17, 2013*

**English**

1 The lack of a ___ system of measurement is an international problem. scanty, uniform, transient, instantaneous 2. Almost ____ communication kept the President up-to-the-minute with events at the conference. exponential, transient, instantaneous, nostalgic 1. uniform 2....

*August 21, 2013*

**English**

Which word has the most nearly opposite meaning of capitalized word? 1.FRACTION eon, portion, whole, moment 2. STATIC temporary, nostalgic, changeable, gradual 3. LINEAR straight, narrow, bright, crooked 4. HINDER progress, cripple, help, obstruct 5. QUANTITATIVE huge, abrupt...

*August 21, 2013*

**English**

1. THE _____ OF THE VARIOUS GROUPS IN THE CITY HELPED TO BUILD THE NEW PARK. A. COMPROMISE B. CONCOCTION C. CONTEXT D. COALITION 2. CONTEMPORARY:MODERN: A. EARLY:LATE B. CALM:RELAXED C. SMOOTH:ROUGH D. NEW:OLD 3. COMPLACENT:WORRIED: A. TIRED:OVERWORKED B. ABOVE:OVER C. CLOUDY:...

*August 12, 2013*

**english**

1. CONGRUENCE:DIFFERENCE: a. walk:stroll b. build:destroy c. talk:speak d. eat:consume 2. CONCOCTION:INGREDIENT a. oil:water b. car:boat c. molecule:atom d. soup:sandwich 3. CONCURRENT:SIMULTANEOUS a. shut:closed b. pretty:talented c. easy:difficult d. fast:slow 1.B 2.C 3.A

*August 12, 2013*

**Chemistry**

Sorry to post again but I'm really stuck on this one! I'm doing some post lab questions and I'm stuck on one. In lab we performed Tollens test, Fehlings test, and Jones Oxidation to differentiate our unknown between an aldehyde or a ketone. The question I'm ...

*July 16, 2013*

**Chemistry**

I'm doing some post lab questions and I'm stuck on one. In lab we performed Tollens test, Fehlings test, and Jones Oxidation to differentiate our unknown between an aldehyde or a ketone. The question I'm stuck on is " older bottles of benzaldehyde are often ...

*July 16, 2013*

**Chemistry**

We completed a lab and the conclusion write up asks us to describe the purity of the product. What are some things that determine the purity of the product?

*June 26, 2013*

**chemistry**

Calculate Kp at 298 K and 490 K for the reaction NO(g) + 1/2 O2(g) = NO2(g) assuming that Delta H(g) is constant over the interval 298 K - 600 K. Do you expect Kp to increase or decrease as the temperature is increased to 600 K?

*April 7, 2013*

**Chemistry**

Stuck on this because I haven't done chemistry in a while. Can someone guide me through it or help me out? Balance the reduction-oxidation chemical equation in base: MnO4- + HSO3- -> MnO2 + SO4^ 2-

*March 6, 2013*

**maths**

A cannon is placed on a hillside pointing up the hill, where the hill is at an angle a Pi/4 to the horizontal. The cannon points at an angle Pi/6 to the slope. and a shot is red uphill with initial speed v0. (i) Find the maximum value of the distance between the ...

*March 2, 2013*

**English**

It's suppose to be never. Sorry I guess we all make typo errors.

*February 8, 2013*

**English**

1. The distance to the finish line seemed (endless). 2. I have ever ran so (fast). 3. Eli ran a surprisingly (fast) time in the trial. 4. He walked (confidently) to the starting blocks. 5. Is the high jump the first (field) event? 6. We looked (exhausted), but we felt great! ...

*February 8, 2013*

**English**

1. I (hurridely) dressed in my uniform. 2. The runner beside me looked (serious). 3. The crowd cheered (enthusiastically) for all the runners. 4. Our team is so (excited) about the 400-meter relay. 5. Pedro jumped (easily) and cleared the bar. 6. Coach Williams (proudly) ...

*February 8, 2013*

**Language**

Are these correct now?

*February 7, 2013*

**Language**

1. adverb 2. adj 3. adv 4. adv 5. adj 6. adj

*February 7, 2013*

**Language**

3. adverb

*February 7, 2013*

**Language**

No I'm not guessing...I just get confused on these.

*February 7, 2013*

**Language**

2. adv 5. adj 6. adv

*February 7, 2013*

**Language**

5. adv 6. adv

*February 7, 2013*

**Language**

1. The distance to the finish line seemed (endless). 2. I have ever ran so (fast). 3. Eli ran a surprisingly (fast) time in the trial. 4. He walked (confidently) to the starting blocks. 5. Is the high jump the first (field) event? 6. We looked (exhausted), but we felt great! ...

*February 7, 2013*

**Language**

1. adj 6. adv 7. adj

*February 7, 2013*

**Language**

1. We arrived (late) for the track meet. 2. The locker room smelled (musty). 3. Will the first event begin (soon)? 4. The (anxious) participants filled the bleachers. 5. Can you line up (quickly)? 6. I can't believe I finished (first)! 7. Is the high jump the fist (field) ...

*February 7, 2013*

**Statistics**

A bag contains two blue, three purple, four yellow, two red, three green and one orange marbles.p> What is the conditional probability that, without replacement, the second marble is purple given that the first marble is green?

*February 4, 2013*

**math**

Thanks!!!

*October 1, 2012*

**social studies**

1. Did Benedict Arnold help the Americans or British when fighting for Independence? 2. Did Jorge Farragut help the Americans or British? 1. Both 2. Americans

*September 18, 2012*

**physics**

average speed is 10.3kmh 15km/h for ten hours is 150km 20km/h for 6 hours is 120km 10km/h for 5 hours is 50km 10hrs at rest 150+120+50=320km in 31hrs Speed average=total distance travelled/time taken 320/31= Average speed of the ship is 10.3km/h currently trying to work out ...

*September 4, 2012*

**physics**

This is what i did but i totally could of got it so wrong. this assignment is way harder then i thought it would be :) Landing craft mass=12000kg d=160m above moon surface Vi=15m/s g on earth=9.81m/s g on moon g/6 g on moon=1.635m/s Vf=0m/s Needed thrust=?? Assuming the crafts...

*September 4, 2012*

**Physics review**

In this example, sound waves are created in a tube. The tube is partially filled with water and the level of water is adjusted in the tube until there is a standing wave. Draw the lowest frequency standing wave for the two water levels in the drawing. The drawing has two tubes...

*July 25, 2012*

**Physics**

Two cars have identical horns, each emitting a frequency of f= 395 hz. One of the cars is moving with a speed of 12 m/s toward a bystander waiting at a corner, and the other car is parked. The speed of sound is 343 m/s. what is the beat frequency heard by the bystander?

*July 23, 2012*

**Physics review**

Add the accel+radius+ mass? I was a little unclear I need the moment of inertia for each individual object. Does what you said still apply?

*July 12, 2012*

**Physics review**

So I've already found/ was given the radius, hanging mass, and acceleration for three objects but I need to find the moment of inertia using all those three. What equation do I use or how do I incorporate all of them to find the moment of inertia?

*July 12, 2012*

**Physics**

Should the 1.4 that you used be 1.1?

*July 11, 2012*

**Physics**

Why does it have to be zero?

*July 11, 2012*

**Physics**

Sorry for the typos. It should say, "of length"

*July 11, 2012*

**Physics**

A uniform plank of lent light 5m and weight 225N Rests horizontally on two supports with 1.1m of the plank hanging over the right support. To what distance,X, can a person weighing 450 walk On the overhanging part of the plank before it just begins to tip?

*July 11, 2012*

**Physics**

Just to comment, I'm not trying to hw dump like the person underneath me. If someone can help me get started I can usually finish

*July 8, 2012*

**Physics**

A hollow sphere of radius 25 cm is rotating at 13 rad/ sec about an axis that passes through its center. The mass of the sphere is 3.8 kg. assuming a constant net torque is applied to the sphere, how much work is required to bring the sphere to a stop?

*July 8, 2012*

**Physics**

Sorry it posted twice on accident

*July 8, 2012*

**Physics**

A string is wrapped around a pulley of radius .20m and momentum of inertia .40 kg•m^2. The string is pulled with a force of 28 N. what is the magnitude of the resulting angular acceleration? Can someone please go through the steps or at least guide me through them. I ...

*July 8, 2012*

**Physics**

A string is wrapped around a pulley of radius .20m and momentum of inertia .40 kg•m^2. The string is pulled with a force of 28 N. what is the magnitude of the resulting angular acceleration? Can someone please go through the steps or at least guide me through them. I ...

*July 8, 2012*

**Physics please help!**

Yea I do know about V2. And thanks so much, I really appreciate it!

*July 5, 2012*

**Physics please help!**

I have tried to work this one out and really can't get it. We have two carts that have magnets to keep them from touching. One cart is initially at rest and we push the second cart towards it. Because the two carts will not actually touch, the collision is elastic. Use the...

*July 5, 2012*

**Physics**

PLEASE HELP!

*July 4, 2012*

**Physics**

Sorry the unknowns are V1'= ? V2'= ? P1= ? P1'=? % difference =? KE1'= ? KE2' = ? % difference = ?

*July 4, 2012*

**Physics**

I know I said I didn't know how to start my last question and them figured it out on my own but this one I have tried to work out and really can't get. We have two carts that have magnets to keep them from touching. One cart is initially at rest and we push the second ...

*July 4, 2012*

**physics**

Actually I think I solved this one. I set P= M1V1-M2V2 and then used the equation Pfinal = (M1+M2)•V final and then solved. Is that right?

*July 4, 2012*

**physics**

We have two carts moving towards each other at different speeds andstick together after colliding. Use the information to calculate the velocity of the two carts after the collision. Remember that the carts are moving in opposite directions before the collision and ignore ...

*July 4, 2012*

**math**

1. Which situation is not a function? a) the number of days d below freezing each month b) the total cost of an item that costs x dollars with 7% sales tax c) the number of miles driven at a constant speed of 45 miles per hour after x hours d) the total cost of n tickets that ...

*April 15, 2012*