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April 18, 2015

Posts by Helper


Total # Posts: 1,735

math
81x^2 - 54xy + 9y^2 9(9x^2 - 6xy + y^2) 9(3x - y)(3x - y) 9(3x - y)^2
February 11, 2011

algebra
25y^2 - 4z^2 A = Lw Factor, 25y^2-4z^2 (5y - 2z)(5y + 2z) L = (5y - 2z) m^2 w = (5y + 2z) m^2
February 11, 2011

math
GCF = 3x^4 3x^4(5x - 3)
February 11, 2011

Math
Triangle Area = 1/2 bh 60 = 1/2 15b 120 = 15b b = 8 base = 8 height = 15 s = sides The height h of the isosceles triangle h = (sqrt(s^2 - 1/4 b^2)) 15 = (sqrt(s^2 - 1/4 8^2)) 15 = (sqrt(s^2 - 1/4 64)) 15 = (sqrt(s^2 - 16)) Square both sides 225 = s^2 - 16 s^2 = 241 s = 15.52 ...
February 11, 2011

algebra
(x + 2)/13 = 7/13 Multiply both sides by 13 x + 2 = 7 x = 5
February 11, 2011

Algebra
In 1995--64.8 yrs In 1999--67.2 yrs To write the equation, use the points 1999 - 1995 = 4 yrs 1995--(0, 64.8) 1999--(4, 67.2) Equation through two points, y - y1 = (y2 - y1)/(x2 - x1) * (x - x1) y - 64.8 = (67.2 - 64.8)/(4 - 0) * (x-0) y - 64.8 = 2.4/4 x y - 64.8 = 0.6x y = 0....
February 11, 2011

calculus please help
f(x) = -1/2(x^2) Step 1 f(x + h)= -1/2(x + h)^2 f(x + h)= -1/2(x^2 + 2xh + h^2) f(x + h)= -1/2 x^2 - xh - 1/2 h^2 Step 2 f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 - (-1/2 x^2) f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 + 1/2 x^2 f(x + h) - f(x) = -xh - 1/2 h^2 f(x + h) - f(x) = h (-x...
February 11, 2011

Calculus
The derivative of a constant is 0. f' = 0
February 11, 2011

Calculus
Example of 4 step process f(x) = -1/2(x^2) Step 1 f(x + h)= -1/2(x + h)^2 f(x + h)= -1/2(x^2 + 2xh + h^2) f(x + h)= -1/2 x^2 - xh - 1/2 h^2 Step 2 f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 - (-1/2 x^2) f(x + h)-f(x)= -1/2 x^2 - xh - 1/2 h^2 + 1/2 x^2 f(x + h) - f(x) = -xh - 1/2 h...
February 11, 2011

pre- algebra
Sorry, John I was rushing to leave. I said to add but I then I had a typo. Thanks to MattsRiceBowl for catching this.
February 10, 2011

pre- algebra
6 * 6 * 6 * 6 * 6 * 6 * 6 * 6 = ? Or use a calculator
February 10, 2011

pre- algebra
6^4 * 6^2 = 6^8 (add exponents) I'll leave it to you to cal. 6^8
February 10, 2011

math
Largest rectangle is a square P = 2w + 2L 68 = 2w + 2L 34 = w + L 34/2 = 17 34 = 17 + 17 Dimension = 17 x 17
February 10, 2011

Math
-4/0 = undefined You CANNOT divide by 0.
February 10, 2011

Math
slope = undefined
February 10, 2011

algebra
w = width w + 10 = length Area = 144 A = Lw 144 = w(w + 10) Solve for w
February 10, 2011

algebra
Solve the following, 14 + x + 4 + 2x - 3 >= 57
February 10, 2011

Math
negative * positive = negative Same for division. (√2/2)/(-√2/2) = -1 If this isn't your complete problem, you must have a mistake someone.
February 10, 2011

math
27m^2 - 36 + 12 Can't be factored, but can be simplified. 27m^2 - 24
February 10, 2011

math
10s^2 + 4st - 6t^2 2(5s^2 + 2st - 3t^2) 2(5s - 3t)(s + t)
February 10, 2011

math
y^2 - y + 0 = y(y - 1)
February 10, 2011

Math
5y + 3 = 2y - 3x + 5 Subtract 2y from both sides 5y - 2y + 3 = 2y - 2y - 3x + 5 3y + 3 = -3x + 5 3y = -3x + 2 y = -x + 2/3 y = 2/3 - x
February 10, 2011

geometry
Similar figures have corresponding sides, areas and perimeters in the same proportion. 32 : 288 = 4 : x 32/288 = 4/x cross multiply 32x = 1152 x = ?
February 10, 2011

math
A = Lw 12y^3+48y^2+24y Factor into 2 factors. 1st factor = w 2nd factor = L
February 10, 2011

Math
Not solve, simplify (√(2)/2) / (-2/√(2)) (sqrt(2))/2 * (sqrt(2))/2 = -2/4 = -1/2 I don't know what this means in regards to the above. (simplify part) "the answer is 1 in other words it's tan(π/4)= 1"
February 10, 2011

math--incomplete problem
Your problem is incomplete.
February 10, 2011

Algebra--incomplete problem
What is your question?
February 10, 2011

Math
10y = 5x + 10 y = (5x + 10)/10 y = 5x/10 + 10/10 y = 1/2 x + 1
February 10, 2011

math
Should be 5 : 8 = 15 : x 5x = 120 x = ?
February 10, 2011

math
5 : 8 = 15 : 8 5/8 = 15/x Cross multiply 5x = 270 x = ?
February 10, 2011

Math-True OR False Please Help!
the y-intercept of f(x) is an x-intercept of f^-1 Look at the example I did for you. What is the y-intercept of f(x)? What is the x-intercept of f^-1? Are they the same? If yes, true. If not, false.
February 10, 2011

Math-True OR False Please Help!
This exact question was answered yesterday. Are you Sam too? Try an example to see if this is true. f(x) = 3x - 1 So, f(x) has y-intercept = -1 To find inverse of f(x), y = 3x - 1 x = 1/3 y + 1/3 y = 1/3 x + 1/3 f^-1 = 1/3 x + 1/3 To find x-intercept, y = 1/3 x + 1/3 0 = 1/3 x...
February 10, 2011

math
0.0725 * 20 = 1.45 20.00 + 1.45 = ?
February 10, 2011

???---English
If you would like an answer to your question in a timely manner please follow directions. Place your school subject name in the School Subject box.
February 10, 2011

Math
Please don't repost a question without checking your prior post for an answer. Your check was answered the first time you asked.
February 10, 2011

Math
20% = .20 Savings = 0.20 * 45.87 Savings = ?
February 10, 2011

MATH
1/2 ball = hemisphere d = 3 r = 1/2 d = 1.5 V = 2/3 pi r^3 V = 2/3 (3.14)(1.5)^3 V = 2/3 (3.14)(3.375) V = ?
February 10, 2011

Calculus
derivative of 4e^x+x^3 Dx(e^x) = e^x Dx(x^3) = 3x^2
February 10, 2011

math 3rd grade
How about a straight angle (a line)?
February 10, 2011

math
Reposting your question will NOT get you an answer faster. You must have patience. Tutors volunteer their time. Maybe a tutor familiar with your problem is not here. Please stop clogging the board.
February 10, 2011

fin 200-kim your problem is incomplete
What is your question?
February 10, 2011

Math
x = total 0.70 x = 290,000 x = 290,000/0.70 x = 414,285.70
February 10, 2011

Math
(3cd^4)(-2c^2) There is nothing to solve. Multiplying, (3cd^4)(-2c^2) = -6c^3d^4
February 10, 2011

Math--Diane check your problem
What is  ?
February 10, 2011

math
You're welcome. :) If you get stuck, post your work and someone will help. I'll check your answer if you would like.
February 10, 2011

math
See your first post. Do this problem the same way.
February 10, 2011

math
64 mph, 15 min = .25 hr (15/60 = .25) D = RT (Distance = Rate * Time) R = 64, T = .25 .25 * 64 = ?
February 10, 2011

Math
m = Margaret's age m + 4 = Kate's age m + 7 = Margaret's age in 7 yrs m + 4 + 7 = m + 11 = Kate's age in 7 yrs m + 7 + m + 11 = 70 2m + 18 = 70 2m = 52 m = 26 Margaret is 26 Kate is 30
February 10, 2011

Graphing(I Truly Need Help) :)
If you google function graphs or something similar, I'm sure there is a website where you can input your function and the graph is produced.
February 10, 2011

MAth(Someone please help)
If you google function graphs or something similar, I'm sure there is a website where you can input your function and the graph is produced.
February 10, 2011

math
If you are Katherine, this question was answered in your 1st post last night. Please check your prior post for an answer before reposting. I pasted the answer below. Ratio = Boys : Girls = 4 : 3 4x = number of boys 3x = number of girls 4x - 6 = 3x x = 6 4x = number of boys = 4...
February 10, 2011

math
I showed you step by step how to do this. Now it's your turn to try to do this problem.
February 10, 2011

math
130 mi in 3.5 hrs 130 mi * 5280 ft/mi = 686,400 feet 3.5 hr * 60 min/hr = 210 min Rate = Distance/Time 686,400/210 = 3268.571 feet/min
February 10, 2011

Algebra 1
Is line AC perpendicular to line BD Two lines are perpendicular if their slopes are negative reciprocals of each other (m1 * m2 = -1). I'll leave the work for finding these lines to you. AC--through (-2,1), (5,7) y = 6/7 x + 19/7 slope m1 = 6/7 BD--through (3,3), (0,5) y...
February 10, 2011

math 2
When two figures are similar, the reduced ratio of any two corresponding sides is called the scale factor of the similar figure. Example One side of a square is 6 and the corresponding side of a similar square is 3. The ratio is 6 : 3 or 6/3 = 2. The scale factor is 2 : 1.
February 10, 2011

math
Post an example problem with directions and someone will help you.
February 10, 2011

algebera
w = width 2w + 3 = length P = 2w + 2L 30 = 2w + 2(2w + 3) Solve for w, the width. 2w + 3 = length
February 10, 2011

Math
w = width 2w + 1 = length P = 2w + 2L 302 = 2w + 2(2w + 1) Solve for w, the width. length = 2w + 1
February 10, 2011

algebra-incomplete problem
Interesting, but what is your question?
February 10, 2011

geometry
What is your question? I will find EH for you. Rectangle ABCD, AB = 10, BC = 6, CD = 10, AD = 6 Similar figures The ratio of the lengths of their corresponding sides are equal. Ratio of AD : AB = EH : EF 6/10 = EH/25 150 = 10EH EH = 15
February 10, 2011

urgent alg 1
(2t - 8t)+ (8t + 9t) 2t - 8t + 8t + 9t 2t + 9t = 11t (t +8t ) + (-3t ) t + 8t - 3t 9t - 3t = 6t
February 9, 2011

Math--lsa check your problem
What does this part mean? Laura helps, they get the job done in 5 1 2 hours. Please fix.
February 9, 2011

geometry
This is geometry? LCM of 5, 8, and 10 is 40. Shortest length of string = 40 cm Is this what you need?
February 9, 2011

math
Also, please use * for the multiplication sign. Using "x" is confusing since "x" is a variable.
February 9, 2011

math
You must use parentheses. Is this your problem? |(45 - 27)/(3x(5-8))|?
February 9, 2011

math
8 = (4 * 4) - 9 + 1 8 = (10/2) + 5 - 2 8 = (2 + 8)/5 + 6 Is this what you need? Now you try to do the rest.
February 9, 2011

business math
Are you sure the interest is 3.25% per month? That is 39% per year. Maybe you mean 3.25% per year?
February 9, 2011

math
You're welcome :)
February 9, 2011

math
radius
February 9, 2011

math !!!! :O
Your question was answered . See your 1st post. Please have patience. Tutors volunteer their time to answer your questions. If you haven't received an answer after 6 - 12 hours, then repost.
February 9, 2011

Pre Algebra
The formula for simple interest is, I = PRT (Interest = Principle * Rate * Time) Balance of account ? t + 9 years?
February 9, 2011

Pre Algebra
See your other post.
February 9, 2011

to HELPER advanced funtions
I don't have an answer different from the one you were given. If I could help more I would. What answer are you looking for? The answer did answer the question. The answer gave similarities and differences.
February 9, 2011

math
Ratio = Boys : Girls = 4 : 3 4x = number of boys 3x = number of girls 4x - 6 = 3x x = 6 4x = number of boys = 4 * 6 = 24 3x = number of girls = 3 * 6 = 18 If another 2 girls join the choir, 18 + 2 = 20 = new number of girls 24 = number of boys New ratio = 24 : 20 = 6 : 5
February 9, 2011

Math
You're welcome :)
February 9, 2011

Math
Please don't type in all caps. This is the equivalent to shouting and is rude. 3 less than twice x = 2x - 3 2 more than the quantity 3 times x = 3x + 2 (2x - 3)(3x + 2) = ? Use FOIL to expand.
February 9, 2011

algebra
(3a-2b)(4a+3b) Using FOIL-first, outer, inner, last (3a - 2b)(4a + 3b) First = 3a * 4a = 12a^2 Outer = 3a * 3b = 9ab Inner = -2b * 4a = -8ab Last = -2b * 3b = -6b^2 12a^2 + 9ab - 8ab - 6b^2 Combine like terms 12a^2 + ab - 6b^2
February 9, 2011

Algebra
2x - y = 4 if x = 0 2(0) - y = 4 0 - y = 4 -y = 4 y = - 4 if y = 0 2x - 0 = 4 2x = 4 x = 2 Now, it's your turn. Solve the rest just like the examples above.
February 9, 2011

math
Check your problem. Not enough info is given here to find any angles.
February 9, 2011

math
You're welcome :)
February 9, 2011

math
angle 1 = x angle 2 = x + 7 angle 3 = x + 7 + 31 x + x + 7 + x + 7 + 31 = 180 Solve for x, measure of angle 1. Then, angle 2 = x + 7 angle 3 = x + 7 + 31
February 9, 2011

business math
You are missing the % for interest and the amount for the annual deposit into the IRA.
February 9, 2011

math
(1 1/2 + p)*2^2 = 12 4(1.5 + p) = 12 6 + 4p = 12 4p = 6 p = 6/4 = 3/2
February 9, 2011

algebra
A = Lw 16y^7 + 32y^5 + 80y^3 Factor into 2 factors. 1st factor = w 2nd factor = L
February 9, 2011

math
1 1/2 + 8 3/4 + 5 1/8 + 1 1/4 Find the common denominator, 8. 1 4/8 + 8 6/8 + 5 1/8 + 1 2/8 Now can you add these?
February 9, 2011

advanced funtions
You must have patience. Tutors volunteer their time to answer questions. Maybe a tutor that is familiar with you question isn't on right now. Reposting the same question over and over will not get an answer any sooner. Also, if you look at one of your prior posts someone ...
February 9, 2011

Math
See your prior post. This problem is done the same way. Substitute y = x + 2 in x^2 + y^2 = 36, and solve for x. Then find y. You are missing the exponents in x^ + y^ = 36 I assume the missing exponent is squared.
February 9, 2011

algebra
n = games played 4 = games lost n - 4 = games won Ratio, won : lost (n - 4) : 4
February 9, 2011

math
2^2 (two squared) means 2 * 2 = 4 3^2 (three squared) means 3 * 3 = 9 In 3^2 The exponent (2) means how many times you multiply the base (3) by itself. 2^3 (two cubed) means 2 * 2 * 2 = 8 3^3 (three cubed) means 3 * 3 * 3 = 27 In 3^3 The exponent (3) means how many times you ...
February 9, 2011

Math
y = x + 2 y = x^2 Substitute, y = x + 2 in y = x^2 x + 2 = x^2 x^2 - x - 2 = 0 (x - 2)(x + 1) = 0 x = 2, x = -1 Substitute, x = 2 and x = 1 in one of the equations to find y.
February 9, 2011

science
Silent killer means that there are not any overt symptoms when your blood pressure is high. Example, generally, you can't feel that your blood pressure is high (like pain) and therefore, you won't know to see a doctor for treatment. Generally, untreated HBP damages ...
February 9, 2011

Math
Depends on the shape. Volume of a rectangular box, V = Lwh units^3
February 9, 2011

MATH PLEASE HELP!
See your 1st post for an answer.
February 9, 2011

Statistics-desperate
Can't you explain the 'funky symbols'?
February 9, 2011

beginning algebra
w = width L = 2w + 1 A = Lw 28 = w(2w + 1) 28 = 2w^2 + w Solve for w by completing the square.
February 9, 2011

Math
Try an example to see if this is true. f(x) = 3x - 1 So, f(x) has y-intercept = -1 To find inverse of f(x), y = 3x - 1 x = 1/3 y + 1/3 y = 1/3 x + 1/3 f^-1 = 1/3 x + 1/3 To find x-intercept, y = 1/3 x + 1/3 0 = 1/3 x + 1/3 -1/3 = 1/3 x x = -1 So, f^-1 has an x-intercept = -1. ...
February 9, 2011

Trig
Coterminal A = A + k*360 To find a positive coterminal angle A = -240 Coterminal A = -240 + 360 Coterminal A = 120 To find a negative coterminal angle A = -240 Coterminal A = -240 - 360 Coterminal A = -600
February 9, 2011

geometry honors
V = 1/3 bh V = 64 h = 16 b = area of base 64 = 1/3 (16)b Solve for b, area of the base
February 9, 2011

business accounting
Actually, the above probably isn't what you need.
February 9, 2011

business accounting
From productivity501 "Maslow said that people start with the lowest level of this hierarchy and that their basic motivation comes from trying to meet their needs sequentially at each level. Any time their needs aren’t being met, their motivation always reverts to ...
February 9, 2011

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