Questions Asked on
April 12, 2017

Pre calc
sin(θ − ϕ); tan(θ) = 5/12 θ in Quadrant III, sin(ϕ) = − sqaure root 10/10 ϕ in Quadrant IV I tried this numerous times can somone please help me
asked by Rachel 
Chemistry
Use the data in the table to calculate the equilibrium constant for the following reaction. HCOOH(aq)+ OH −(aq) equilibrium reaction arrow HCOO−(aq)+ H2O(l) HCOO is 5.9e11 (Kb) HCOOH is 1.7e4 (Ka) Not sure how to find the equilibrium constant given
asked by Dani 
Texas State History
What is the purpose of the NAFTA treaty?
asked by Lauren 
Social studies
1. What event would most likely cause an increase in sales A. Decrease in price B. Increase in supply C. Decrease in product quality D. Increase in quality product Answer: A 2. What is stated by the law of supply A. An increase in price will cause a
asked by HELPPPPP SOCIAL 
government
Highlight four limitations on the rights of a citizen
asked by muhammad 
chemistry
In the predicted electron configuration of Molybdenum (Mo), how many electrons are in the 4d subshell? 2. How many electrons are in the 4d subshell of the Molybdenum (III) ion?
asked by please someone help 
Math
Is the sum of two integers always greater than the difference between them? Why or why not? Give examples to support your answer.
asked by Help I need somebody not just anybody 
Math
a model rocket is launched from a roof into a large feild. The path of the rocket can be modeled by the equation y=0.8x^(2)+12x+25.8 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height in meters of the
asked by 
Biology
If gene frequency for PTC nontaster is 0.4, then what will be the number of heterozygotes tasters in a population?
asked by Pooja 
math
Express the radius r of a sphere as a function of the volume V it encloses.
asked by HELP!!!!!!!!!!!!!! 
Literature
WHAT IS MAMA'S STRATEGY? MAMA: There is someone who wants to marry Trina. JENNY: Who'd want to marry Trina? MAMA: Mr. Thorkelson SIGRID: Peter Thorkelson? Little Peter? (She gestures a midget.) (5)MAMA: So he is hardly bigger than your Arne. Does every
asked by Me 
physics
2. What value did you calculate for the index of refraction of the glass block in Part 2? How does your value compare to the accepted value of 1.53? Calculate the percentage error. Different materials have distinct indexes of refraction. Explain how you
asked by Anonymous 
math
An atom of gold has a mass of 3.25x10^22.What is the mass of 8000 atoms?Express in scientific notation.
asked by Nabela 
Algebra
Astronomers measure large distances in lightyears. One lightyear is the distance that light can travel in one year, or approximately 5.88*10^12 miles. Suppose a star is 3.2*10^12 lightyears from Earth. In scientific notation, approximately how many
asked by Anonymous 
PHYSICS
A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the stone reaches its maximum
asked by BENSON 
SCIENCE
A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the stone reaches its maximum
asked by BENSON 
Quantitative Statistic
The following information is available. H0 : μ ≥ 220 H1 : μ < 220 A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the
asked by Janice 
chemistry
3a.How many electrons are predicted to be in the 4p orbital of a bromine (Br) atom? 5 b.How many of these electrons are predicted to be unpaired? 5
asked by Im about to lose my mind 
U.S History
5. The purpose of the progressive era was to drive reform in which of the following areas. (1 point) A. Politics and goverment B. Buisness C. Social welfare and labor conditions D. All of the above.
asked by Youaintwannaknow 
Science
Place the following words into the in order gametes, sporophyte, gametophyte, and zygote. Explain how the terms are related.
asked by Urgent! 
Calculus
1. Can you identify holiday periods or special events that cause the spikes in the data? 2. What holiday results in the maximum sales for this department? 3. a) Generate linear and quadratic models for this data. b) What is the marginal sales for this
asked by Anonymous 
Math
Define a variable and write an expression to represent the following phrase: Seven years younger than Lisa.
asked by Meh 
Social studies
which of the following statements about World War 1 would be most difficult to prove and disprove a. American casualties were more numerous than in any other war. b. it was the first war in which the opposing sides used airplanes c. the U.S government
asked by anonymous 
college chemistry
The equilibrium constant for the reaction Sr(s) + Mg2+(aq) Sr2+(aq) +Mg(s) is 3.69 x 10^17 at 25 C. Calculate Ecell for a cell made up of Sr/Sr2+ and Mg/Mg2+ half cells.
asked by danielle 
Physics
To make ice cubes you fill am ice tray with 150g of water at 20°C. How much energy must be removed from the water to create ice cubes at a final temperature of 10C
asked by Kevin 
chemisrty
Suppose that 0.490 mol of methane, CH4(g), is reacted with 0.640 mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released?
asked by khari johnson 
Math
A rectangular family room has 204 square feet of floor space. If its length is 17 feet, how many feet wide is it? A. 18 B. 12 C. 17 D. 187 E. Not enough information is given. Answer: 204/17=12
asked by Anaymous 
Math
A pet shop bought a litter of puppies for $120. All but four of them were sold, a a profit of $5 each, for a total of $120. How many puppies were in the litter.
asked by john 
french 1
A wide variety of activities are enjoyed by French young people but in their schools, there are generally not programs for competitive sports. True False
asked by Anna 
Calculus
If y′= x(1+ y) and y > 1 , then y = The differential equation dy/dx=y/x^2 has a solution given by:
asked by AP Study Question 
Physics
A 30km/h (8m/s) gust of wind results in 25 N of force on a kite that pulls a 50kg kiter off her feet and drags her 8m. How much work does the kite do?
asked by Mileena 
College Algebra
A box contains $7.80 in nickels, dimes, and quarters. There are 46 coins in all, and the sum of the numbers of nickels and dimes is 2 less than the number of quarters. How many coins of each kind are there? Here is my work so far: x + y + z = 46 x + y = z
asked by Gabbi 
Math
which equation has (2,1) as a solution? y=2x1 y=x+3 y=x3 y=2x+1
asked by Iamapple 
chemistry
If 35 mL of H2SO4 is titrated to the equivalent pint with 45 mL of 0.30M NaOH, what is the molarity of the H2SO4 before and after the reaction?
asked by Casey 
english
Which literary movement often rejects order, blurs distinctions between literature types, and uses playfulness in storytelling? Classicism Realism Naturalism Postmodernism
asked by pablo 
Emily dickson
Three fact about her poet "The sky is low,the clouds are mean"
asked by Dom 
algebra
To completely factor 5c^224cd5d^2, I used the following steps: (5c d)(c 5d) to give terms,ignoring signs,5c^2,cd,25cd,5d^2. +cd25cd. (5c+d)(c5d) Please correct,if necessary,and show correct way to show this problem. Thank You.
asked by Anneliese 
chemistry (I have a test tomorrow)
4 Ag + 2 H2S + O2 = 2 Ag2S + 2 H2O a) What mass if silver sulfide is formed from the reaction of 0.120g of silver? b) What mass of hydrogen sulfide is needed in the same process? So I understand a, and I found the answer to be 0.138g. For b the text book
asked by Laura 
Math
Simplify the expression 131,000x0.0003 using scientific notation and express the answer in scientific notation.
asked by Maleka 
french
It is customary to greet someone on the street with "allô". False True
asked by Anna 
math
The sum of the first 5 terms of a GP is 61. If the 5th term is 81 solve the value of the common ratio.
asked by john 
Math
6x10^5x700 divided by 4x10^5x1.5x10^7 simplify using scientific notation/
asked by Maleka 
math
I need to paint 2 walls of 125 feet long (W)x 8 feet tall (Height). how many gallons of paint do I need to buy to cover all the walls?
asked by martha 
Math
Suppose k is a continuous function so that k(2)=3 and k'(2)= 4 . a. Use the given information to approximate the value of k(1.4). b. If k''(x)
asked by Sarah 
Calc
Suppose that f'(c)=0, f''(c)=0 and f'''(c)>0 . What, if anything, happens to the graph of the function f at x = c? Explain clearly and completely.
asked by Ashley 
Maxima
Hello, I'm working on a problem involving the equation v=sqrt(6*9.8(sin x0.2 cos x)) Using maxima I have a graph but since maxima uses radians I decided to put sin and cos values multiplied by pi/180 to get degrees. So I now have a graph which looks
asked by Peter 
Physical Science
An experiment was done. Pulling blocks of mass that were certain amounts of newtons. There were 2 tests done. However, they varied by a couple decimals after the second test. The results from the two tests differ slightly. Which would most likely cause the
asked by Marcus Peerbocus 
Social studies
Does having an unusual name, such as Chastity, Englebert or Moon unit, have an effect on how a child develops? The results of some previous studies agrees with the commonsense idea that such as name could cause a child to be rejected or ridiculed and thus
asked by anonymous 
MAth
In a set of five consecutive positive even integers, the ratio of the greatest integer to least integer is 2 is to 1. If these integers are arranged from lowest to highest, which is the middle integer in the list?
asked by john 
Science, Physics
Assume you are speeding down the freeway at 75 mph. The car weighs 1500 kg and the effective force of the brakes is 14400 N. The car in front of you suddenly slows down, it takes 3 seconds for the car to do so. Your initial velocity was 33.53 and your
asked by Elizabeth 
value
The sum of a nonnegative number & its square is less than 12.What could the number be?
asked by value 
Ethics
Should people from wealthy countries be allowed to obtain organ transplants from individuals in developing countries? Help?
asked by Anonymous 
algebra
I need to write an inequality with the following information;I have a summer business selling book markers. They cost .75 to make and I'm selling them at $4.00 each. Write an inequality with variables showing earnings with the sale price and the number
asked by anonymous 
physics
Evaluate the following statement (T/F/N), explain: If you reduce by half the distance between two point charges, you double the magnitude of electrical force that each exerts on the other.
asked by Josh 
social studies
Which set correctly identifies the features shown on the map 1. A Andes Mountains. B Pamps 2. B Atacama Desert C Pamps 3.A Atacama Desert D Andes Mountains 4. C Andes Mountains D Pamps i think it is 1 im not sure
asked by josh 
Math
Fred and Jane are brother and sister. Fred is 3years older than twice jane's age. The sum of their ages is less than 36. Taking jane's age To be x years form a inequation. What can you say about jane's age.
asked by Kareen 
English
1. I can't do the science project myself. It's too difficult? What does it refer to? #2 or #3? 2. doing the science project myself 3. the science project  4. I'm going to Tom's house to work on the science project. 5. I'm
asked by rfvv 
stats homework
to estimate p, the proportion of all newborn babies who are male, the gender of 10,000 newborn babies was noted. if 5106 were male determine a) a 90 percent confidence interval estimate of p b) a 99 percent confidence interval estimate of p?
asked by john 
Calculus
If y′= x(1+ y) and y > 1 , then y = The differential equation dy/dx=y/x^2 has a solution given by:
asked by AP Study Question 
math
Place grouping symbols in this expression so that the value of the expression is 37.Then justify your answer by simplifying the expression. 8×56+12÷6
asked by Shirley 
trigonomentry prove
[sin(b)+sin(2b)]/(1+cosb+sin(2b)=tanb plz i need ur help prove for me show step
asked by nuru 
social studies please help physics
If the abesolute pressur at the bottom of a fresh water pond is 2.313*10^5 PA,what will be the depth of the pond?
asked by Anonymous 
English
1. Write down four friends' names in the name column in the table. 2. You can communicate with others in groups with the five questions on the blackboard. 3. What is her mother asking of her? 4. I'd like you to introduce one of your friends in the table to
asked by rfvv 
Physics
I am not getting the difference between distance and displacement.... without using the words scalar and vector quantity, of course, i know what they mean but still i need help with this... so please help!!!
asked by Anoushka 
Physics
Point A is  52m and point B is + 32 m. A car travels from point A to B in 1.2s. What is the speed and velocity of the car. If the car stops at B and returns to A what is the distance traveled and the displacement?
asked by Mileena 
Physics
Why are w=fxd and E =mc2 both energy
asked by Mileena 
math
Why is 4^2 16, not 16? To me, 4 * 4 = 16 because a negative times a negative equals a positive. I understand (4)^2 being negative but not without the parentheses. Thank you.
asked by Carly 
Math; Statistic
At peak periods, 15% of attempted logins to an email service fail. Logins attempts are independent and each has the same probability of failing. Ann logs in repeatedly until she succeeds. A. find the probability that Ann needs to log in at least four
asked by Jerome 
geography
what are the causes of dumping
asked by kutlo 
Math1
trinomials 2n^2 + 15n + 7
asked by Jordan 
Social Studies Please help
Which statement best evaluates the results of Greece's membership in the European Union A. Greece's overall economy has improved because of increased trade. B. Greece's overall economy has improved because the euro is a strong Currency. C. Greece's overall
asked by Kaitlyn 
Math1
trinomials 7d^2 + 50d + 7
asked by Jordan 
maths steve reiny bob reiny!!! Help
If line 2x+y=3 and x2y=1 form the sides of a rectangle whose other sides meet at the point (3, 4), find the equations of the other sides and the area of the rectangle plz help show solution step
asked by nuru 
Math
Which of the following is equivalent (2)5 A.2 + (5) B.2 + 5 C.2 + (5) D.2(5)
asked by Help I need somebody not just anybody 
Science. HELP!!
If you decrease the frequency of a wave, how does the velocity change?
asked by Josh 
Science
Assume you are speeding down the freeway at 75 mph. The car weighs 1500 kg and the effective force of the brakes is 14400 N. The car in front of you suddenly slows down, it takes 3 seconds for the car to do so. Your initial velocity was 33.53 and your
asked by Athena 
science URGENT!!
what is the relationship does wave height have with frequency? What is the relationship does wave height have with amplitude?
asked by cody 
plz i need steve can u help dr bob222 help as well
A crystal is grown by evaporating A and 8 type atoms, and then letting them condense to form the crystal. If, because of the forces involved, on A atom is twice as likely to stick to the crystal OS a B atom, what is the probability that the final crysta
asked by mayerimi 
Physical Science
Determine how long it will take given the scenario below (in time and in distance) to react to the car in front of you. Assume that the car in front of you takes 3 seconds to change speeds. Reaction time 1.6 seconds Speed: 75 mph Initial velocity: 33.53
asked by Liz 
Math
The 24 students in Mr. Brown's homeroom sold 72 magazines subscriptions. The 28 students in Mrs. Garcia's homeroom SortIt 98 magazine subscriptions. Whose homeroom sold more magazine subscriptions per student? Explain your reasoning.
asked by Lennox 
Chemistry
If 2.5x10^3 moles of O2 were produced in the reaction, how many grams of H2O2 had to react?
asked by Michelle 
MAth
Ifa#b=a*b2*a*b+b*b(a)*b+b*b then find 4#(3) *=multiplication
asked by deepti 
Calculus
Apply the concepts of calculus (limits and derivatives) to describe the graph y = sec(x). Include a quality graph
asked by Bob 
Mathfractions
A receipt requires 1/2 cup of flour for every batch of cookies. How many full batches of cookies can be made with 5 1/2 flour?
asked by kim 
precalc
Find all the real zeros for the equation p(x)=x^3+4x^2+x6
asked by Austin 
Chemistry
An electron is in the 5f orbital. What are the values or sets of values for… a. The principle quantum number (n)? b. The angular momentum quantum number (l)? c. The magnetic quantum number (ml)?
asked by Alex 
Social studies
The spread of Christian ideas
asked by Anonymous 
science(computer)
what line should i adopt after matric if i'm not good at maths???? (pakistan)
asked by M Kamal 
chemistry
why photosynthesis is considered as endothermic?
asked by darsini 
Precalculus
f(y)=1/5y^4 What is the power function and constant of variation?
asked by Anonymous 
chemistry
In the predicted electron configuration of Molybdenum (Mo), how many electrons are in the 4d subshell? 2. How many electrons are in the 4d subshell of the Molybdenum (III) ion?
asked by John 
World history
Need help ASAP What was one result of Hitlers invasion of the soviet union. A: Germany gained access to soviet factory's and farms. B: Stalin fled to the soviet union. C: Germany was able to take control of Leningrad. D: Churchill and Stalin became allies
asked by Anonymous 
chemistry
Carbon dioxide gas is predicted to diffuse _______ times faster than sulfur dioxide gas under the same conditions.
asked by pleaase someone help me 
Maths
Please solve this trigonometric identity proof problem. I have completed 20; this is the hardest one. Many thanks (sin^3(x)cos^3(x))/sin(x)cos(x)=1+sin(x)cos(x)
asked by Joe 
MATH
The work crew for the talent show at the local high school includes these members: 2 freshmen,4sophomores,8juniors,6 seniors.If the sponsor randomly chooses 1 member of the work crew to announce the act & 1 member to control the lighting, what is the
asked by marilyn 
chemistry
If you titrated 50 mL of HCl and 50 mL H2SO4, each of the same molarity, with NaOH. What is the numerical ratio of the volume of NaOH required for HCl compared to that for H2SO4?
asked by Amanda 
Maths
Please help Trigonometric identities proof (cot^2(x)(sec(x)1))/1+sin(x)=(sec^2(1sin(x))/1+sec(x) Many Thanks
asked by Joe 
math
Laura is standing 9 ft away from a light pole, Her shadow is 6 ft long. If Laura is 5 ft tall, which is closest to the height of the light pole?
asked by marilyn 
MATH (7th Grade)
Laura is standing 9ft away from a light pole. her shadow is 6ft long. If Laura is 5ft tall, which is closest to the height of the light pole 14.8???
asked by marilyn 
Ring Structures
Can someone tell me how a Beta 'L' manopyranose structure will look like?
asked by Anno 
Chemistry
If 42 mL of Cr2O72(aq) solution is titrated to the endpoint with 172 mL of 0.15 M Cl, what was the concentation of Cr2O72 solution? I got the reaction 14 H+(aq) _ Cr2O72(aq) + 6 Cl = 2 Cr+3(aq) + 3 Cl2(g) + 7 H20(l) Now I have drawn a blank. Please
asked by Adrianna 
Calculus
Find the anti derivative for 4/(x^2+1)
asked by Bob 
Math
For what value(s) of b, if any, will the function q(x) = (x^4)/2 +b*x^2 +32x5 have a derivative of zero AND a point of inflection at the same value of x?
asked by Lucy 
physics
A plane is cruising at 155.00 km/h increases it speed to 285.1 km/h in just 11.5 s as it makes a dive. What was the acceleration of the plane? a = vf  vi / t
asked by taylor 
chemisrty
Calculate the density of Argon (Ar) gas at 400.0K and 1.23 atm.
asked by someone help me please 
CHEMISTRY
What is the rootmeans square speed of Sulfur Dioxide gas at 345.0K?
asked by S.O.S 
Quantitative Statistic
The following information is available. H0 : μ ≥ 220 H1 : μ < 220 A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the
asked by Janice 
English
This summer, Joel’s plan is to travel. How does the infinitive function in the sentence? A) as an adjective *** B) as a predicate nominative
asked by M, S, E 
History
How has the united states used economic pressure to promote the spread of democracy
asked by Chris 
Trig
In which quadrant would the image of point (5,3) fall after a dilation using a factor of 3?
asked by Sue 
Math
A 24ounce bag of chips cost $2.88. If the unit price stays the same, how much would a 40ounce bag of chips cost?
asked by Sheena 
AP physics
search "ap waves and sound free response questions answers" into google and click on the second one that pops up. answers are on the bottom of the page. question number 23 i don't understand why it is B.
asked by Anthony 
science
Frogs hear with their _______ lining of their mouth tongue tympanum nostrils*** I'm not so sure about this question. I went back and looked in my book but i can't find anything, I searched it to and still couldn't find anything. Could someone please help
asked by swimmerGirl 
chemistry
How many phases and components are present in a saturated solution of Na2so4 with excess of solid is present at equilibrium with its vapour in a closed vessel
asked by buhle 
Calculus
Consider the function f(x)= x^3+5 sqrt(x) Let F(x) be the antiderrivative of f(x) with F(10=9
asked by Bob 
Social Studies
Please help me find products that changed Europe during the Renaissance along with a slogan, thank you I really need help.
asked by Dejavu 
Business
1) Why is it an excellent idea for anyone, to ALWAYS pay their credit card bill off, at the end of each month 2) Describe what kind of interest (simple or compound) should you look for in an investment, state why. 3) LanSun just received a notice
asked by Sam 
Calculus
consider the function f(x) = 9/x^3 10/x^7 let F(x) be the antiderivatice of f(x) with F(1)=) then F(x)=
asked by Bob 
Calculus
A particle is moving as given by the data below 4sin(t)3cos(t); s(0)=0
asked by Bob 
Physics
What is the mass of the meterstick shown in the figure (Hint: 25% of the meterstick’s mass is to the left of the fulcrum and 75% is to the right)?
asked by Rayan 
Math
An atom of gold has a mass of 3.21x10^22.What is the mass of 8000 atoms?Express in scientific notation.
asked by Nabela 
S.S.
How was Hitler killed?
asked by Tommy 
English
1. He read the book in 5 days. 2. He read the book after 5 days. 3. He read the book within 5 days.  In a dictionary, I found that 'in' is used as 'within' in American English. Then it's confusing. Does #1 mean #3 in American English? I
asked by rfvv 
English
What's Karen doing over there. She is supposed to be studying, but it looks like she is playing Andrew's game.
asked by Anonymous 
Science
What is the average speed in average velocity of a tip of minute hand in 1 hour where the length of the minute hand is 10 cm
asked by Saraswati 
Science
When are tides in the earth's oceans the highest
asked by Cj 
English
1. My hobby is chatting in a chat room. 2. My hobby is chatting in chat rooms.  Which one is the better of the two? Do we have to use a singuglar form or a plural form? 3. My favorite food is noodle. 4. My favorite food is
asked by rfvv 
science
A golf ball was hit and projected at an angle of 65° with the horizontal. If the initial velocity of the ball was 60m/s.Calculate the time the golf ball was in the air and the horizontal distance the ball travelled
asked by jaypoy 
Chemistry
What would be the effect on Ksp if an unsaturated solution of CaSO4 was titrated instead of a saturated solution of CaSO4. would ksp be higher, lower or the same? would ksp be higher due to the more ions available in the solution. so you would have to use
asked by Sean 
Math
Draw a circleofradius5cmandalinethroughthecenterofthecricledrawatangenttothecriclemakingaangle30degree
asked by Draw circleofradius5cmandalinethroughthecentreofth 
PHYSICS
If the absolute pressur at the bottom of a fresh water pond is 2.313time10^5PA.what will be the depth of the pond?
asked by PHYSICS 
English
1. He grew 25 cm last year. 2. He grew by 25 cm last year. (Is 'by' deleted in Sentence 1? What is the meaning of 'by' here?)
asked by rfvv 
History
Explain the effects of World War II, on both the United States and on Georgia. so far I've got, the economy declined,
asked by Anonymous 
MATH
Simplify the expression 20,000x0.024 using scientific expression.
asked by Egypt 
Math
the thirteenth term of an arythmeticprogression is 27. given that the seventh term equals to three times the second term, find: the first term nd the common difference of the progression
asked by Brian 
Math
3.3x0.006x10 divided by 12x0.005x200 simplify and express in scientific notation.
asked by Maleka 
Math
how do i find the nomial rate? A=500×(1.01^(4t)) is there a formula to find it? confused
asked by Kacie 
College Algebra
Solve using substitution.If the system has infinitely many solutions, express your answer in terms of k. If the system is inconsistent, enter INCONSISTENT. Here is my work: y=5x5 5xy=5 5x(5x5)=5 5x5x+5=5 5=5 y=5x5 k=5x5 5x=k+5 x=1/5k+1 x,y = (k/5+1,
asked by Gabbi 
physics/chemistry:sir steve drbob222 steve steve
A crystal is grown by evaporating A and 8 type atoms, and then letting them condense to form the crystal. If, because of the forces involved, on A atom is twice as likely to stick to the crystal OS a B atom, what is the probability that the final crysta
asked by weyeremi 
government
Wtat is legitimate government? Outline any four features of legitimacy? What is simple majority sysyem? Outline four demeits of the system
asked by fatima 
Math
24. solve the system of equations algerbraically. show all of your steps. (2 points) y=x^(2)+2x y=3x+20 I'm just having trouble understanding. Please help
asked by 
chemistry
How much heat in kJ is required to increase the temperature of an 87.0 g sample of water from 67oC to 136.6oC?
asked by please help me(I have no idea what to do) 
math
A pipe is cut into twp pieces. One piece has a length of 33 inches. If the other piece has a lenght of u inches, what was the total lenght of the pipe, in inches, before cut?
asked by john