Saturday
March 15, 2014

# Homework Help: 2nd Grade

Linear Algebra
1. Considering 2 planes with equations: x + 2y - 3z = 1 x + 2y - 3z = 18 (a) Given (a,b,c) a point on the first plane, find the point where the line perpendicular to both planes passes by (a,b,c) and through the 2nd plane.
Wednesday, October 10, 2012 at 12:15am

7th Grade x y input output tables
i need help with x and y input output tables for 7th grade i dont understand what 5x means or what to do! Math hw problems: 1. y=4x+3 x=1,2,5,10,20 2.d=3.5t t=1,2,5,10,20 Please help ASAP!!!!!
Tuesday, October 9, 2012 at 7:14pm

Math
e^((5x^2)+(3x)-(7)) d/dx(e^u) = e^u du/dx = (10x+3) e^(5x^2 + 3x - 7) why would you even consider the 2nd choice?
Monday, October 8, 2012 at 4:55pm

pre calculus
I would use substitution to start: from the 3rd: z = 13y + 2 into the 1st: 3x - 10y + 13y + 2 = 5 3x + 3y = 3 x+y=1 into the 2nd: -4x + 9y - 13y - 2 = -6 -4x - 4y = -4 x + y = 1 Ahhh, x+y = 1 and x+y = 1 don't have a real solution. So the system has no unique solution. ...
Sunday, October 7, 2012 at 7:53pm

algebra 2
i'm trying to solve this system of equations with 3 variables 5a-b+3c=5 2a+7b-2c=5 4a-5b-7c=-65 i tried to make the first equation like a=something so i could substitute it in to the 2nd equation, however i get decimals so it doesnt work how do i do this problem?
Sunday, October 7, 2012 at 1:29pm

college algebra
5. Amand Heinl, an IRS auditor, took 45 minutes to process her first tax return. The IRS uses an 85% learning curve. C. 2nd return take D. 4th return take E. 8th return take
Sunday, October 7, 2012 at 7:33am

English
I'm a 7 Letter Words, You Read me daily, My 5, 6, 7th Letter increases every Year. 3rd and 4th Letter are the Same. My 3rd, 2nd and 5th Letter Covers 75% of the World. What am i?.
Saturday, October 6, 2012 at 4:03am

Even when I occasionally taught a section of 7th grade math over 20 years ago, irrational and real numbers were not part of our curriculum.
Friday, October 5, 2012 at 7:45pm

statistics
You are given the following data. Number of Absences Final Grade 0 95 1 91 2 82 3 69 4 67 5 58 - Find the correlation coefficient for the data. - Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
Thursday, October 4, 2012 at 11:05am

Math
Ohk so it will be - 1st glove - 20 2nd glove - 18/19 3rd glove - 17/18 4th glove - 16/17 5th glove - 15/16 Total probability = 1 - the probability of above things right ??
Wednesday, October 3, 2012 at 9:44pm

Biology
It's not the 3rd option, because the stem stores water Roots do not contatin stomata I beleive it would be either of the first two; my guess would be the 2nd
Wednesday, October 3, 2012 at 7:20am

Ahhh, this would be so easy with algebra as was shown by Ms Sue and Shelley, but I guess we can't use algebra for a grade 3 How about making two columns where the two numbers add up to 25 until we see a difference of 9 e.g. 10 15 ----> difference is 5 9 16 ----> ...
Tuesday, October 2, 2012 at 6:08pm

Trigonometry
First: So the angle is in quadrant III tan x = -12/-5 = 12/5, so cot x = 5/12 2nd: point is (-1,√3) which is in quad II you have a right-angled triangle with sides 1, √3, and 2 ( the famous 30-60-90 triangle) cos x = -1/2 sec x = -2
Tuesday, October 2, 2012 at 5:59pm

math
there are 15 boys and 18 girls in fifth grade. Find the ratio of boys to girls in fifth grade.(how do I get the answer) can someone show me how to work the problem
Monday, October 1, 2012 at 8:52pm

MATH
tHERE ARE 4 FIFTH GRADE CLASSES IN A SCHOOL. EACH CLASS Has 24 STUDENTS. fOR EACH GYM PERIOD, TWO FIFTH GRADE CLASSES TAKE GYM TOGETHER. tHERE ARE 10 GYM PERIODS IN ALL DURING SCHOOL WEEK. wHAT INFORMATION IS NOR NEEDED TO FIGURE OUT HOW MANY TOTAL STUDENTS TAKE A GYM PERIOD ...
Monday, October 1, 2012 at 8:01pm

math
not a Q but wanted to say tks for help last nite. I'm 9 & live w/ my two 10y/o nephews AND we are in the same 4th grade class. We needed help and we all wanted a chance to post on this awesome site, so tks a bunch for helping! Even though our papers were marked wrong on ...
Thursday, September 27, 2012 at 8:02pm

phycology
Depends on how you define young, middle. Abstract reasoning seldom occurs before age 7, and even then, just in a few. My own experience is that one sees the change between 8th grade and 10th grade, and by the 11th grade teaching physics is possible. Piaget developed his ideas ...
Thursday, September 27, 2012 at 6:11pm

Physics
A) Gravity pulls an area of wet soil and rock downward in a landslide B) An ... Many people know that the weight of an object varies on different planets, but did ... If the Earth's gravitational force causes a falling 74 kg student to accelerate .... the acceleration of ...
Sunday, September 23, 2012 at 1:00pm

English
Is the 2nd one hypocrite. If it is I have 4 more words left which are constrain manipulate ruffle stamina Which one goes best for the last one You and Lucy will never settle your quarrel unless _____ each other directly and listen to what the other person has to say
Wednesday, September 19, 2012 at 9:13pm

math,social studies and heaalth
I am in middle school and I want to know what my grade point average is. Do you know any websites where I can calculate my grade point average. Thanks.
Wednesday, September 19, 2012 at 3:53pm

Chemistry- rate laws
CH3CHO decomposes into methane gas and carbon monoxide gas. This is a 2nd order reaction. Rate of decomposition at 140 degrees Celsius is .10M/s when the concentration of CH3CHO is .010. What is the rate of the reaction when the concentration of CH3CHO is .50M? Have not been ...
Tuesday, September 18, 2012 at 10:18am

Yes I am not smarter than a 6th grader. How do I show the math and in the simplest form for the following: A sixth grade class has 100 sheets of lightweight paper. They use 3/4 of the paper for a collection of class poems. What is the total thickness of the paper they use?
Monday, September 17, 2012 at 7:27pm

Calculus -- OOPS!
I mixed up x and y in the 1st one! x^2+y^2 = 12y x^2 - 12y + y^2 = 0 x^2 + (y-6)^2 = 36 Also, the 2nd one could just as well have been written r = 14cosθ. It would just draw the circle from the left, rather than from the right.
Monday, September 17, 2012 at 4:09pm

physics
A car coasts (engine off) up a 30 degree grade. If the speed of the car is 25m/s at the bottom of the grade, what is the distance traveled by the car before it comes to rest?
Sunday, September 16, 2012 at 5:06pm

I did my calculations wrong and now Im going to get a bad, bad, bad grade on my lab report I need to know what how to find the highth and width and radius of several things are help me plz!!!!
Saturday, September 15, 2012 at 5:33pm

math
a(1-r^4)/(1-r) = 15/32 a/(1-r) = 1/3 divide the 1st by the 2nd 1-r^4 = 45/32 r^4 = 1-45/32 = -13/32 no real solution for r, since we can't take an even root of a negative check your typing.
Saturday, September 15, 2012 at 10:26am

college algebra
I would go for the y's 3 times the first added to the 2nd ---> 4 times the first added to the 3rd ----> you now have two equations with only x and z try to finish it.
Thursday, September 13, 2012 at 7:54pm

college algebra
add the last two: 4x + 6y = -4 from the 1st: y = -2-2x sub into above new equation: 4x + 6(-2-2x) = -4 4x - 12 - 12x = -4 -8x = 8 x = -1 then y = -2+2 = 0 in the 2nd: x+y-z=-4 -1+0-z=-4 -z=-3 z=3 x=-1 y=0 z=3
Thursday, September 13, 2012 at 7:43pm

math
Decimals are hard....... that is the answer to a math paper splitting the letters into 3 words. First word is 8 letters, 2nd is 3 and the 3rd is 4.
Tuesday, September 11, 2012 at 9:32pm

Legally Drunk?
I put this into www.google.com and it was the 2nd link down: blood alcohol level drunk Yes, I'm sure there are some differences based on where you live and that's for Google's advertising purposes! But this is such a basic website, I think it would show up on all ...
Monday, September 10, 2012 at 11:47am

STATISTICS
"a grade less than 58 and greater thAN 110 " No student will receive this grade! Seriously, you probably mean "a grade less than 58 or greater thAN 110 " What can be done is to calculate the percentage of students who receive X, where 58≤X≤110. Given...
Monday, September 10, 2012 at 8:36am

Math 8R - HW Qs. Check
Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c (7-6 = 1) i+h = a ...
Sunday, September 9, 2012 at 4:35pm

Math 8R - HW Qs. Check
Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c (7-6 = 1) i+h = a ...
Sunday, September 9, 2012 at 2:04pm

how do u do standed form? for 3rd grade home work math
Wednesday, September 5, 2012 at 6:24pm

Johan
Given angle 1 = (x + 7)degree, angle 2 = *(2x -3)degree, angle ABC = (x 2nd power) degree, angle D = (5x - 4)degree. Show that angle ABC congruent to angle D I can't seem to solve this?
Tuesday, September 4, 2012 at 1:11am

Algebra
since 200 = 6*33 + 2, there will be 33 repeated groups, with 2 digits left over. The 200th digit is thus the same as the 2nd digit, or 2
Monday, September 3, 2012 at 1:49pm

Physics
Use the equations: S=vi*t + (1/2)gt^2 For 1st ball: 20=0+(1/2)gt^2 => t=sqrt(40/g) For 2nd ball: 20 = vi*(t-1) + (1/2)g(t-1)^2 vi = [20-(1/2)g(t-1)^2]/(t-1) =(20-(9.81/2)*(t-1)^2)/(t-1) =14.62 m/s downwards
Friday, August 31, 2012 at 8:04pm

Algebra..
what's the problem? In each coordinate pair, the 1st number is in the domain, the 2nd in the range. example: 2c: f*g = (1,-4), (3,-12) since 2 and 4 are not in the domain of g, and 5 is not in the domain of f, f*g is not defined there. 2e: gofoh = g(f(h) h(1) = 0 but g(0) ...
Friday, August 31, 2012 at 4:23pm

Business and math question
Isabella is hoping to get an A on her college algebra course. With just the final exam left to take, she currently has an average of 92 on her exercises. The quizzes count for 40%, exercises count for30% of the class grade. What is the minimal grade that Isabella must have on ...
Thursday, August 30, 2012 at 2:11pm

Isabella is hoping to get an A on her college Algebra course. With just the finaL exam left to take, she currently has an average of 85 on her quizzes and average of 92 on her exercises. The quizzes count for 40%, exercises count for 30% of the class grade. What is the minimal...
Thursday, August 30, 2012 at 11:07am

Algebra2
domain: {-1,2} range: {2,4,6} domain is the x-coordinate (1st value) range is the y-coordinate (2nd value) f(x) is certainly not x^2 + 2 (-1)^2 + 2 = 3, not 4 (2,6) fits, but (2,2) does not. In fact, since (2,2) and (2,6) contain the same x-value, but different y-values, these...
Wednesday, August 29, 2012 at 5:25pm

math
as many as 4. If one number has fewer digits than the other, it's smaller. The number with the smaller first digit is smaller. If the first digits are the same, go on (3987,3762) similarly for the 2nd, 3rd, 4th digits
Tuesday, August 28, 2012 at 11:56am

algebra
Tony went to the racetrack with \$80. He won \$15 on the 1st race, lost \$12 on the 2nd, lost \$6 on the 3rd and won \$8 on the 4th. How much money did he have after the 4th race.
Tuesday, August 28, 2012 at 6:58am

Physics (2nd question)
Apparently you have already answered question 1. If not, see the "related Question" below. Question 2: If the ball starts at a height of Ho = 44 m, if loses the available kinetic energy until it reaches the maximum height Hmax g*Ho + Vo^2/2 = g*Hmax (Hmax-Ho)= Vo^2/(...
Sunday, August 26, 2012 at 9:43am

8TH GRADE MATH EXPRESSIONS
CAMERON IS IN 8TH ASUNTE IS IN 5TH THIS PROBLEM IS 8TH GRADE MATH.YES I NEED TO EXPRESS IT INTO MATH TERMS. TY
Thursday, August 23, 2012 at 8:55pm

8TH GRADE MATH EXPRESSIONS
Asunte/Cameron -- are you in 5th or 8th grade? How would you express this in math terms?
Thursday, August 23, 2012 at 8:50pm

9th grade algebra/Ms Sue
Okay Ms. Sue. I am in 8th grade but I am taking Algebra with 9th graders. I am very confused with my previous problem. I have asked my Dad but we are both getting confused. Now I have come up with 22. Is this my correct answer?
Wednesday, August 22, 2012 at 9:59pm

geography
which country is the biggest (mongolia,china,southkorea,north korea,japan? p.s. i am 8 yaers old and going to 4th grade so use 4th grade words so thank you but no thanks to the geeks. sincerely, cesia xoxo
Tuesday, August 21, 2012 at 11:06am

physics
aq = (V-Vo)/t = (-9.3-15.5) 0.015=-1660 m/s^2. NOTE: The final velocity is in the opposite direction. Therefore, it is NEGATIVE. A 2nd interpretation: While the ball is in contact with the wall, its' velocity is o. a = (0-15.5) / 0.015 = 1033.3 m/s^2.
Monday, August 20, 2012 at 9:44pm

algebra 2
How far have you gotten? Copying and pasting the equations to solve? That's not too far. to solve polynomials, set everything on one side equal to zero: x^2 + 6x + 1 = 0 try using the quadratic formula for this one. For the 2nd one, since you have basically, a^2 = b^2, ...
Saturday, August 18, 2012 at 12:53pm

math
Only 1 choice for the 1st spot, 10 choices for the 2nd, 10 choices for the 3rd and 9 choices for the 4th 1x10x10x9 = 900
Saturday, August 18, 2012 at 7:31am

writing
You're in 8th grade. You can certainly at least try to answer those questions. Is 8th grade going to be too hard for you? Maybe you should rethink your dreams of going to college for 8 years or so.
Wednesday, August 15, 2012 at 5:49pm

math
My son is in Kindergarten and I have no idea about the "Counters" in the question: 1st) Cover the teddy bears in the top row with different-color teddy bear counters. 2nd) Color the teddy bears in the bottom row to show the colors." Help. Thanks You.
Tuesday, August 14, 2012 at 8:37pm

Phys
no. once two opposite and equal forces are acting on the body, its net acceleration is zero. So, whatever velocity it had when the 2nd force started, it will keep that velocity.
Saturday, August 11, 2012 at 12:59pm

Physics
Upon a flat only 10 m high (Is that possible?) there are two guns A and B attached together making a vertical angle of 60 degrees when A is flat on roof. They fire at the same time and has the same reloading time. Both guns are capable of giving an initial velocity of 5√...
Friday, August 10, 2012 at 4:56am

Math
7x^2 + 4x - 13 = 8 multiply by 7 to get a perfect square on the 2nd-degree term: 49x^2 + 28x = 147 49x^2 + 28x + 4 = 147 + 4 (7x+2)^2 = 151 7x = -2 ± √151 x = (-2 ± √151)/7
Thursday, August 2, 2012 at 9:54am

Dynamics
The time of the first ball motion to the top point is v=v(o1) –gt, v=0, t=v(o1) /g=18/9.8 = 1.84 s. The maximum height of the 1st ball is H= v(o1) •t –gt²/2=16.53 m. When the 2nd ball starts, the 1st ball is on its return trip during 2-1.84 =0.16 s. It ...
Monday, July 30, 2012 at 8:53am

math
we know r^2 = x^2 + y^2 and x/r =cosØ, y/r = sinØ given: rsecØ = 3 r = 3/secØ r = 3cosØ r = 3(x/r) r^2 = 3x x^2 + y^2 = 3x , rewrite it any way you want. the last one is done the same way 2nd : I will assume you r = 5/(cosØ-2sinØ...
Sunday, July 22, 2012 at 11:26pm

Updated Math Question
no, the answer is d) let the radius of first circle be r area = πr62 let the area of 2nd circle be 9r area =π(9x)^2 = 81πr^2, which is 81 times larger.
Wednesday, July 18, 2012 at 12:58pm

Math/calculus
Thank you very much but how do I calculatethe speed at which it crashes to the ground? I got38.181 for the max height do I start from there? Thanks again, going through the calculations you gave makes it easier to understand how I use the formulas. I am never sure when to use ...
Saturday, July 14, 2012 at 11:20am

Physics
The two conditions of equilibrium are: 1. Concurrent Equilibrium : the sum of vector forces through a point is zero. 2. Coplanar equilibrium: the sum of forces in a plane is zero and the sum of the torques around the axis of the plane is zero. Here we've used the 2nd rule
Wednesday, July 11, 2012 at 5:06pm

Math
2nd line: (a^12)^k = a^(3k+15) a^(12k) = a^(3k+15) 12k = 3k+15 9k = 15 k = 15/9 = 5/3
Wednesday, July 11, 2012 at 7:12am

math
1st 10 Ft = \$100. 2nd 10 Ft = \$125. 3rd 10 Ft = \$150. 4th 10 Ft = \$175. 5th 10 Ft = \$200. 6th 10 Ft = \$225. 7th 10 Ft = \$250. 8th 10 Ft = \$275. 9th 10 Ft = \$300. TOT. = \$1800.
Tuesday, July 10, 2012 at 8:03pm

calculus
first derivative: -2sinx + 2cos 2x 2nd derivative: -2cosx - 4sin 2x take it from there
Friday, July 6, 2012 at 10:47pm

math
The first obvious comparison to me is that homework counts about 10% of the total points. Each of the four tests also count about 10%. Add those to the final, and the professor is counting over 50% of the grade on exams. Another quarter of the grade is the lab.
Thursday, July 5, 2012 at 8:47pm

math
not sure if this had to do with math but my professor gave us this last hw assignment that i don't understand at all. It has to do with the grade scaling he does. 4x Exams = 37450 HW = 9362 Final = 16385 Lab = 23407 Recitation = 7022 Total Points = 93626 He asks whats the ...
Thursday, July 5, 2012 at 8:35pm

Chemistry
Sorry, if I wasn't very clear. I've tried both acid and HCl for the 1st blank and borax and base for the 2nd blank, but still wrong. end point is right though!
Thursday, July 5, 2012 at 6:11pm

intermeidate algebra
double the first -6x + 8y = 2 -1 times the 2nd 6x - 6y = 3 add them: 2y = 5 y = 5/2 sub into 1st: -3x + 4(5/2) = 1 -3x = -9 x=3
Friday, June 29, 2012 at 5:44pm

calculuss review for exam
Take a look at the explanation of the 2nd derivative test. If y'' < 0 you have a max, and if y'' > 0 you have a min where y'=0.
Thursday, June 21, 2012 at 3:50pm

Solve for Q Q= sin^-1 1.5/9.8 I got 8.80 Is this correct? I have a TI-30 calculator and to do the sin^-1 I pushed the 2nd button and then sin. I am not sure if this is correct.
Wednesday, June 20, 2012 at 10:31am

Math
multiply the first by 20 to get rid of those nasty decimals x + 2y = 26 subtract the second equation from that y = 7 plug back into the 2nd x+7=19 x=12 x=12, y=7
Friday, June 15, 2012 at 11:37pm

world issuse
​I am a word of 7 letters, u read me daily, my 5th, 6th n 7th letters increase each year, my 3rd n 4th letters are de same, my 3rd, 2nd n 5th letter covers 75% of de world. Wat am I? Pls give the ans
Thursday, June 14, 2012 at 12:27pm

1st. -168 + 8 = -168 + 1*8. 2nd. -168 + 16 = -168 + 2*8. 3rd. -168 + 24 = -168 + 3*8. 4th. -168 + 32 = -168 + 4*8 88th. ---------= -168 + 88*8 = 536.
Sunday, June 10, 2012 at 11:47am

I CANNOT BELIEVE THIS IS A THIRD GRADE WORKSHEET! THIS IS SOO INAPPROPRIATE. THEY HAVE NEVER DONE LONG DIVISION OR REMAINDERS & THERE IS ONE WEEK OF SCHOOL LEFT & THIS IS WHAT THE TEACHER HANDS OUT.....86 DIVIDED BY 9, 17 DIVIDED BY 3, 73 DIVIDED BY 8 ! HOW MANY FLUID OUNCES ...
Tuesday, May 29, 2012 at 11:42pm

Art
1. ... saying that he is not used to being touched by ... 3. ... for having told both her mum and the housekeeper ... 4. Use simple past, not past perfect tenses. Comma needed in 2nd sentence. 5. Her ... sees ... Everything else is OK.
Tuesday, May 29, 2012 at 6:21pm

math
mike has an average of 89 on the five tests he has taken so far this semester. what grade must mike earn on the next test to raise his average grade exactly to 90?
Tuesday, May 29, 2012 at 5:38pm

algebra
Let cost = 600.00 fixed costs x = set of tiles \$11.00 find the profit equation by substituting your equations for R and C P = R -C THE profit made for 26 and 31 tiles per month. 2nd part; use trail and error to find the quanity of tile sets per month yields the highest profit.
Wednesday, May 23, 2012 at 5:51pm

algebra1
If you triple the first equation , you will get the 2nd so there is only one equation, and there is an infinite number of solutions. Rezu gave you only one here is another (2,2) and another (0,-3) etc
Thursday, May 17, 2012 at 7:42pm

math
P = Po + Po*r*t P = 1400 + 1400*0.0675*0.5 = \$1447.25. NOTE: The beginning of the 3rd qtr = the end of 2nd qtr = 6 mo. = 0.5 yrs.
Monday, May 14, 2012 at 4:54pm

algebra 1
easiest way: double the 2nd, then add that to the first 6y = 12 y = 2 sub back into the 1st 6x - 4 = 2 6x = 6 x = 1
Monday, May 7, 2012 at 2:10pm

Physics 121
m1 =4 kg, m2 = 2 kg, m = 0.5 kg, R = 0.25 m, h= 0.75 m. Projections of the equation according to the 2 Newton's law for two blocks on the horizontal (for the 1st block)and on the vertical (fot the 2nd block) axis: m1•a = T1 m2•a =m2•g-T2, The equation of the...
Sunday, May 6, 2012 at 12:34pm

algebra ll
Need help please.. Identify -7x^3+6x^2+6x+9 Searching for the degree of the first term, 2nd term, 3rd term, 4th term and the degree of the polynomial? I thank you
Saturday, May 5, 2012 at 11:13am

Algebra 1
Are we finding the intersection of these two lines ??? if so then multiply the 1st by 3 ---> 9x + 12y = -6 multiply the 2nd by 4 ---> 8x - 12y = 40 add them 17x = 34 x = 2 plug that into the 1st 3(2) + 4y = -2 4y = -8 y = -2 x = 2, y = -2
Wednesday, May 2, 2012 at 10:28pm

Algebra
first one times 4 ----> 4x + 32y = 12 keep the the 2nd ----> 4x - 2y = 7 subtract them 34y = 5 y = 5/34 sub into original first x + 8(5/34) = 3 x = 3 - 40/34 = 31/17 x = 31/17 , y = 5/34 ( checked the answer)
Wednesday, May 2, 2012 at 10:57am

calculus
1. A hill with a 35 degree grade (incline with horizontal) is cut down for a roadbed to a 10 degree grade. If the distance from the base to the top of the original hill is 800 ft., How many vertical ft will be removed from the hill rounded to the nearest ft
Monday, April 30, 2012 at 7:34pm

Math-Funtions
1a. F(x) = -2(x^2-1)(x+4)(x-3). F(x) = -2(x^2-1)(x^2-3x+4x-12). F(x) = -2(x^2-1)(x^2+x-12). F(x) = (-2x^2+2)(x^2+x-12). F(x) = -2x^4-2x^3+24x^2. b. F(x) = (x+2)(x+1)(x+4). F(x) = (x^2+x+2x+2)(x+4). F(x) = x^3+4x^2+x^2+4x+2x^2+8x+2x+8. F(x) = x^3+7x^2+14x+8. c. F(x) = x(x-6). F...
Sunday, April 29, 2012 at 7:16pm

Math---helpppp
just a lot of number crunching I will do the 2nd one, I am sure you can do the others f(x) = (x+2)(x+1)(x+4) = (x+2)(x^2 + 4x + x + 4) = (x+2)(x^2 + 5x + 4) = x^3 + 5x^2 + 4x + 2x^2 + 10x + 8 = x^3 + 7x^2 + 14x + 8 3rd degree function, called a cubic
Saturday, April 28, 2012 at 8:55am

statistics
assume adults have an IQ score that are normally distrubted with a mean of 105 and standard deviation of 20 A) find the percentage of adults that have an IQ between 94 and 116 B) find the percentage of adults IQ exceeding 120 C)Determine the 1st, 2nd, and 3rd quartiles for ...
Friday, April 27, 2012 at 5:04pm

Pre algebra
yellow = black a horse = a cow just guessing, can't figure out what game we are playing. ahhh, I think I know, 2nd number = 2 time (first number) + 3 or y = 2x+3
Friday, April 27, 2012 at 7:53am

Math
After a Math test, each of the twenty-five students in the class got a peek at the teacher's grade sheet. Each student noticed five A's. No student saw all the grades and no student saw his or her own grade. What is the minimum number of students who scored A on the ...
Thursday, April 26, 2012 at 5:24pm

calculus
I can't see you you came up with that very strange looking answer. As bobpursley pointed out, this is a direct application of the quotient rule I got dy/dx = (2x sinx - x^2 cosx)/(sin^2 x) simplification would leave to several final versions of an answer, certainly not ...
Thursday, April 26, 2012 at 3:02pm

Algebra
shortcut to find vertex of y = ax^2 + bx + c the x of the vertex is -b/(2a) in your case, the x of the vertex = 0/-2 = 0 sub back in f(x) = 1 vertex is (0,1) axis of symmetry is x = 0 2nd: you must mean the x and y -intercepts let y or f(x) = 0 x^2 - 5x - 36 = 0 (x-9)(x+4) = 0...
Thursday, April 26, 2012 at 12:26pm

Algebra
help me solve this exponential problem P to the 3rd power times q 5 over 2 all over q to the 2nd power times r to the negative 6.
Tuesday, April 24, 2012 at 2:24pm

trigonometry
a) 8cosxsinx - sinx = 0 sinx(8cosx - 1) = 0 sinx = 0 or cosx = 1/8 if sinx = 0 , x = 0, 180, 360 if cosx = 1/8, x = 82.8° or 277.18° working on the 2nd....
Saturday, April 21, 2012 at 6:09pm

Math
prob(pink from 1st) = 4/8 = 1/2 prob(pink from 2nd) = 1/3 what is (1/2)(1/3) ?
Friday, April 20, 2012 at 7:59am

Consumer Math
P = Po + Po*r*t. P = 1400 + 1400*0.0675*0.5 = \$1447.25. NOTE: The beginning of the 3rd quarter is the end of the 2nd qtr.
Tuesday, April 17, 2012 at 9:40pm

Physics
Should the wavelengths computed from 2nd order lines be more accurate or more precise than those compute from 1st order lines?
Tuesday, April 17, 2012 at 6:46pm

NYS ELA Online Practice Exam - PLEASE read!
http://www.google.com/search?rlz=1C1GGGE​_enUS379US379&aq=1&oq=7th+grade+ny+ela&i​x=seb&sourceid=chrome&ie=UTF-8&q=7th+gra​de+ny+ela+exam There are several in those search results. I'd choose from among the first 4 or 5 links.
Tuesday, April 17, 2012 at 10:40am

Chem
your right except for the 2nd to be more accurate you shoul multiply by 25.4 then round off it comes out to 746.76 which rounds off to 747mm Hg not 735 which is too short.
Monday, April 16, 2012 at 5:11pm

Really? Wow! I know when i was in the 5th grade, that is what teachers did. I got held back for not having enough credits last year, so, yeah.....
Thursday, April 12, 2012 at 12:38pm

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