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Question 23951: Help please somebody
I'm having a problem with the following question
The distance of a body from a point is given by s=xsin(wt+alpha). Show that the velocity and acceleration are given by v=x cos(wt+alpha)and a=-w^2s
Point me in the right direction please
Cheers Paul
Click here to see answer by khwang(438)

Question 23911: how do you solve systems with subtitute's
can please solve a few of these example problems so I get an ideal of what I need to do.
1)2x+7y=3 x=1-4y
2)4c=3d+3 c=d-1
3)3x-5y=11 x-3y=1
4)3x-2y=12 x=2y=6
Click here to see answer by elima(1433)

Question 23967: How do i get the answer to this problem,it calls for simplification, can you help me? my answer was 2(x^2-x+2) i know its wrong
Thank you in advance.
elias
Click here to see answer by elima(1433)

Question 24058: 6=-4+h
-7+d=-3
9=m+11
f+(-9)=-19
Click here to see answer by elima(1433)

Question 24064: PLEASE HELP ME SOLVE THIS EQUATION WORD PROBLEM:

At the beginning of the school year , Jamie's height was 62 and 1/2 inches . During the year she grew 1 and 3/4 inches , 1 /8 of an inch more than she grew the previous year.
(A) What was jamie's height at the end of the school year?
(B) How tall was Jamie at the start of the previous school year?
Thank you
Click here to see answer by elima(1433)

Question 24082: -7r-8=-5r+3
Click here to see answer by longjonsilver(2297)

Question 24079: -2(x-3)=-3(-8)
Click here to see answer by longjonsilver(2297)

Question 24081: 13+f-8f=25x5
Click here to see answer by elima(1433)

Question 24104: x-6y=2; (6,4)
Click here to see answer by rapaljer(4671)

Question 24110: 216 divied by "N"
"N"=3,4,9
Click here to see answer by rapaljer(4671)

Question 24088: I'm a little stuck on a problem. Can someone help me solve 2/7n+n=5/9?
Click here to see answer by longjonsilver(2297)

Question 24154: 2/5x=3(-5)
Click here to see answer by queenofit(120)

Question 24166: Assume that y waries inversely as x, and y=18 when x=3.Find the constant of variation.Then write an equation for the relation.
Click here to see answer by venugopalramana(3286)

Question 24167: Assume that y vaires inversly as x.If y=8 when x=2.5,find x when y=2.
Click here to see answer by venugopalramana(3286)

Question 24240: what is the formula for solving equation -50t+10=35?
Click here to see answer by AnlytcPhil(1806)

Question 24213: r-6r^2 =-1
Click here to see answer by Alwayscheerful(414)

Question 24267: how do i find the value of "y"
-7y - 2 = 68
Click here to see answer by snowwolf11(1)

Question 24318: hi, I need your help with multi-step equations with fractions!
The problem is 3/4(b+8)=15. I have gotten as far as 3/4 times b. Please help!
Click here to see answer by elima(1433)

Question 24355: Please help with the following problems. Thank you
(3b+2/3)(6b-1/3)
4xy�(2x-y)(3x+y)
Click here to see answer by AnlytcPhil(1806)

Question 24361: b+7b=9
Click here to see answer by AnlytcPhil(1806)

Question 24415: 5/6+ 1/3 + 1/4=
Click here to see answer by piglet162431(90)

Question 24415: 5/6+ 1/3 + 1/4=
Click here to see answer by elima(1433)

Question 24333: Help please with these 2 problems. I have to add or subtract. Thanks in advance.
(q^4-2q^2+10)-(3q^4+5q^2-5)
(4k^3+k^2+k)+(2k^3-4k^2-3k)
Click here to see answer by piglet162431(90)

Question 24349: I need help with one problem using the distributive property.
(4y+3)(y�+3y+1)
Click here to see answer by askmemath(368)

Question 24457: Express as a polynomial
(2x+10y)^3
Click here to see answer by AnlytcPhil(1806)

Question 24350: If possible I need help with the following problems. Thank you for your help.
(5-6y)(3y�-y-7)
and
Office Space: The length of a professors office is x feet, and the width is x+4 feet. Write the polynomial that represents the area. Find the area if x=10ft

Click here to see answer by Earlsdon(6294)

Question 24348: -2y-3(y+1) = -(5y+3)+ y

Click here to see answer by yhtong(11)

Question 24480: wat is:
7x-2=x+16
Click here to see answer by music974(43)

Question 24501: how do you solve two-step equations. Can you give me an example using a two-step equation involving a fraction?
Click here to see answer by elima(1433)

Question 24560: I am having difficulty with 2 step equations reading the wording and then translating it to numbers. question:
The difference of 8 and the quotient of a number and 6 is 9.
this is what I tried x divided by 8 +6=9 and my answer was x=24 am I correct

thanks in advance
Dave H.
Click here to see answer by Earlsdon(6294)

Question 24491: write in standard form 7x-2=3y+8
Click here to see answer by elima(1433)

Question 24625: i have homework but i can't figure it out. please help i'll give you the problem to see if you can figure it out. i have the answer just not the actual work. please help. here it is.
2y + 7 = y
the answer is y = -7 but i can't get how to get to the answer Help!it seems so simple but i just can't get it

Click here to see answer by stanbon(75887)

Question 24626: (5y-4)(-3)+y
Click here to see answer by rahman(247)

Question 24628: hi it's me again you must be thinking "man, this girl is dumb" yeah well you wouldn't be the first to think or say that. but anyway back to my Q it is
11.7 + -2x = x
the answer is 3.9 = x i didn't do the work on this one either. please help!i don't c how you can get to the answer although it's probabl so simple but that wouldn't suprise me i totally SUCK @ math well Cya
signed a very troubled 8th grader.
Click here to see answer by stanbon(75887)

Question 24669: How do you do problems like 2 to the 3rd power x 2 to the 2nd power? Also how do u do x to the 5th power x x to the 2nd power?
Click here to see answer by stanbon(75887)

Question 24695: i am trying to help 9th grader with homework... please help with this problem so that hopefully she can understand:
3n/4 + 8 = -7
Click here to see answer by algebrapro18(249)

Question 24695: i am trying to help 9th grader with homework... please help with this problem so that hopefully she can understand:
3n/4 + 8 = -7
Click here to see answer by elima(1433)

Question 24725: what is
Click here to see answer by rapaljer(4671)

Question 24724: what is
Click here to see answer by rapaljer(4671)

Question 24734: I REALLY NEED HELP WITH THESE QUESTIONS, ITS DUE TOMORROW AND I CANT SEEM TO GET THE ANSWERS TO THESE PROBELMS.. THANKS!
1) y=-3(x+5)^2-4
a)Find the cordinates of the vertex
b)Find the equation of the axis of symmetry
c)Find the equation
-
2) Write in vertex form
y=2x^2+12x-3
-
3)For the quadrate relation 2x^2+x-15=0
a)Determine the number of roots
b)Solve
-
4)Describe and transform y=x^2 to obtain the graph of y=1/2(x+6)^2+12
-
5)Graph the following quadratic below
a)y=(x+2)^2-1
b)y=-2(x+3)^2
Click here to see answer by stanbon(75887)

Question 24718: a-1/3=2/3
Click here to see answer by Alwayscheerful(414)

Question 24717: c-25=19
Click here to see answer by Alwayscheerful(414)

Question 24716: -3d=-63
Click here to see answer by Alwayscheerful(414)

Question 24715: a+4=9.6
Click here to see answer by Alwayscheerful(414)

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