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May 6, 2016

Posts by Helper

Total # Posts: 1,776

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

geometry
1st Box V = Lwh V = 9 * 6 * 24 V = 1296 2nd box V = 1/2 (1296) = 648 V = Lwh 648 = 6(4)h Solve for h
February 9, 2011

algebra
You're welcome :)
February 9, 2011

algebra
2x+(x-y)^3 when x=9 and y=7 2(9) + (9 - 7)^3 18 + (2)^3 18 + 8 = ? Where were you having a problem?
February 9, 2011

physics
It would be Mars Weight/Earth Weight. So 3.71/9.8 which is 0.37857142857. And the 3 sig figs it would be 0.379
February 9, 2011

math
ratio of 8/9,quotient of 8/19,percent of 8/19. Ratio 8/9 is 8 : 9 Quotient 8/19 = 0.42105 Percent 8/19 = 42.11% In case ratio should be 8/19, 8 : 19
February 9, 2011

algebra
35+ 6 x < 20 -2 35 + 6x < 18 6x < -17 x < -17/6
February 8, 2011

Algebra
D = RT (Distance = Rate x Time) 50 = rate going T = time going 50T = distance going 45 = rate returning T + .5 = time returning (30/60 = .5h) 45(T + .5) = distance returning Distances are equal 50T = 45(T + .5) 50T = 45T + 22.5 5T = 22.5 T = 4.5 h 50T = distance going 50(4.5...
February 8, 2011

pre-algebra
What is the original problem? What does the problem state to do? You could write this as, y = 3(x + 7) Depending on your problem y = 3x + 21 is acceptable, especially if you are learning slope-intercept form of an equation. But you wouldn't be wrong to write this as, (if ...
February 8, 2011

Algebra II
No, y = -1 is an extraneous solution. y = 1, is the answer.
February 8, 2011

Algebra II
One answer, x = 6. .5 or 1/2 is an extraneous solution (not a valid solution). If you are asked specifically if there are any extraneous solutions, then you would list it as such. I've never had a problem ask for extraneous solutions, since it's not a solution to the ...
February 8, 2011

Algebra II
6 is correct. If you check your answers, you will find that .5 (1/2) is not a solution. You must always check your answers in the original problem.
February 8, 2011

Math
Where are the choices? w = width 2.25w = length Perimeter P = 2w + 2L P = 2w + 2(2.25w) P = 2w + 4.5w P = 6.5w
February 8, 2011

beginning algebra
-8w + uw + vu - 8v -8w + uw + uv - 8v w(-8 + u) + v(u - 8) w(u - 8) + v(u - 8) (u - 8)(w + v)
February 8, 2011

geometry
The measure of the altitude drawn from the vertex of the right angle of a right triangle to its hypotenuse is the geometric mean between the measures of the two segments of the hypotenuse. Triangle ABC, where A is the vertex, CB is the hypotenuse, and AD is the altitude. AD = ...
February 8, 2011

Math
I don't understand your question. What do you need to do with this list of numbers?
February 8, 2011

Math
A = bh A = 2b * 2h A = 4bh Area would be quadrupled (4 times as much in size).
February 8, 2011

algebra
y = -4x - 2 For x = 1, y = -4(1) - 2 y = -4 - 2 y = -6 Now do the same for (-1) and (-3).
February 8, 2011

algebra 1
I can't graph this for you here. Put "solving systems of inequalities" in google and click on the second link (the one with 'purplemath' in the address). This website gives an example of how to graph and solve inequalities.
February 8, 2011

Calculus
f(x)= 2x^3 - 2x^2 + 1 Find the derivative f' = 6x^2 - 4x The derivative is the slope of a tangent line to a curve, in this case, at (1,1). slope m = 6x^2 - 4x at (1,1) m = 6(1^2) - 4(1) m = 6 - 4 = 2 Using the form of the equation as, y = mx + b, m = 2 y = 2x + b To find b...
February 8, 2011

pre-algebra
It depends on what the problem asks for. If the equation was, 3x + 21 = 0 3(x + 7) = 0 x + 7 = 0 But, the equation is y = 3x + 21. If, the problem said to factor, this could be written as y = 3(x + 7) But, I don't know what her problem is looking for.
February 8, 2011

pre-algebra
y = 3x + 21 is in the slope-intercept equation form (y = mx + b). This equation cannot be simplified. It's as good as it gets.
February 8, 2011

math
1 mile = 5280 feet 5 days * 24h * 60 min * 60 sec = 432,000 sec D = RT, Rate = Distance/Time Rate = 5280/432,000 = 0.0122 ft/sec
February 8, 2011

Calc
derivative of (x^2+14)/x f(x)/g(x) = (g(x)*f' - f(x)*g')/(g(x))^2 (x(2x) - (x^2 + 14)*1)/x^2 (2x^2 - x^2 - 14)/x^2 (x^2 - 14)/x^2
February 8, 2011

math
x = number of goats x = goat heads 4x = goat legs 2x = number of ducks 2x = duck heads 2(2x) = 4x = duck legs x + 4x + 2x + 4x = 99 11x = 99 x = 9 x = 9 = number of goats 2x = 18 = number of ducks
February 8, 2011

Math
(2x + 9)(x - 6) = 0 This is already factored. 2x + 9 = 0 and x - 6 = 0 2x = -9 x = -9/2 x - 6 = 0 x = 6 x = -9/2, and x = 6
February 8, 2011

Math
I don't know why you have four answers, A,B,C, and D? Are you not answering i,ii, and iii ? i) .15 * 385 = 57.75 = 58 ii) Ratio portable media theft : hard copy theft 20% : 3% = .20/.03 = 6.67 iii) 4.13 mil govern ID no. Total people 110 mil (from b.) 4.13/110 = 3.75%
February 8, 2011

pre-algebra-is my answer right
Yes, those points are on that line.
February 8, 2011

math
s = son's age 3s + 5 = Nathan's age
February 8, 2011

Math
Correct
February 8, 2011

Math
(3x^2-8x^3+4x)-(9x^2-x^3+x)+4(6x-7) 3x^2-8x^3+4x -9x^2 + x^3 - x + 24x - 28 -7x^3 - 6x^2 + 27x - 28
February 8, 2011

finance
Beg. Inventory---300 units---11 ea--$3300 Produced---------650 units---12 ea--$7800 Total------------950 units--------$11,100 SOLD--LIFO (Last-in-first-out) From Beg. Inv----50 units--11 ea---$550 From Produced---650 units--12 ea--$7800 Total-----------700 units---------$8350 ...
February 8, 2011

8th grade math
6000 tons nachos 1.25 oz/serving 3.5 serving/person 3.5 serving * 1.25 oz = 4.375 oz/person 2000 lb/ton * 6000 tons = 12,000,000 lbs 12,000,000 lbs * 16 oz/lb = 192,000,000 oz 91,385 people * 4.375 oz/person = 399,809.3750 oz consumed 399,809.3750 oz consumed/192,000,000 oz = ...
February 7, 2011

4th grade math
I am not sure if a 4th grader would solve the problem as follows. x = apple slices 3x = orange slices x + 3x = 32 4x = 32 x = 8 x = 8 apple slices 3x = 3(8) = 24 24 + 8 = 32
February 7, 2011

math
n + n = 8 1/2 2n = 8 1/2 8 1/2 = 8.5 n = 8.5/2 n = ?
February 7, 2011

intermediate algebra
x = no. lbs of 6.50 nuts 6.50x = value of 6.50 nuts 50 - x = no. lbs of 8.00 nuts 8.00(50 - x) = value of 8.00 nuts 7.40(50) = value of mixture 6.50x + 8.00(50 - x) = 7.40(50) Solve for x, lbs of 6.50 nuts 50 - x = lbs of 8.00 nuts
February 7, 2011

math
1/4 of 280 = 70 = 25% (70/280 * 100) Note 1/4 = 25% (1/4 * 100)
February 7, 2011

math
n = total payments or periods Since it is compounded 6 times a year (unusual) n would be, 6 yrs * 6 times a yr = 36 Rate per period, r would be 0.08/6 = 0.0133
February 7, 2011

math
Here is the formula A = P * (r(1+r)^n)/((1+r)^n - 1) Just plug in your numbers A = Payment/period P = Principal r = Rate/period n = Total of payments or periods If you post your answer I can check it for you.
February 7, 2011

calc
Instantaneous velocity, v is the derivative f'(t). 8x^2 - 4x + 1 v = f' = 16x - 4 at x = 3 16(3) - 4 = ?
February 7, 2011

math
You need to answer drwls questions above so he/she can help you.
February 7, 2011

math
Is this your problem? 4|3 - 2x^6| - 3^2 = ? I think you must have copied this wrong. This problem, as typed, is not easy to solve. I used an online calculator and there are 12 different roots for x (4 real and 10 complex. Re-check your problem.
February 7, 2011

math please help?
x = amount invested .07x + .10x = 850 Solve for x, amount invested
February 7, 2011

math
You have to factor to solve. a^5 + 6a^4 + 5a^3 = 0 a^3(a + 1)(a + 5) = 0 a^3 = 0 a = 0 a + 1 = 0 a = -1 a + 5 = 0 a = -5 Do the other problems the same to solve.
February 7, 2011

math
8^(-7/3) = (cube rt 8)^-7 = 2^-7 = 1/128
February 7, 2011

math
(2.6 * 10)^8 = 26^8 = 208,827,064,576
February 7, 2011

Math
4x - 3y = 6 (0,2) x = 0, y = 2 4x - 3y = 6 4(0) - 3(2) = 6 0 - 6 = 6 -6 not= 6 This means that (0,2) is not a solution.
February 7, 2011

Math
27,000 in 3yr, 9%/yr compounded quarterly R = Ai/(1 + i)^n - 1 R = Payment A = Total needed = 27,000 n = Number of payments = 4 * 3 = 12 i = Interest rate = 0.09/4 = 0.0225 R = 27000(0.0225)/((1 + 0.0225)^12 - 1) R = 607.50/((1.0225)^12 - 1) R = 607.50/(1.30605 - 1) R = 607.50...
February 7, 2011

math
u/5 = 1.9 multiply both sides by 5 u = 9.5
February 7, 2011

taxes
Not sure if this will be readable. First set of dates is for date filed. Second set of dates is for refund deposited. return (by 11:00 am) Deposit Check between… Sent* Mailed* Jan 14 and Jan 20, 2011 Jan 28, 2011 Feb 4, 2011 Jan 20 and Jan 27, 2011 Feb 4, 2011 Feb 11, ...
February 7, 2011

algebra
ax/b + cx/d = e Multiply both sides by bd adx + bcx = bde x(ad + bc) = bde x = bde/(ad + bc)
February 7, 2011

math
3x^2 + 5x - 12 = 0 This cannot be factored This can be solved by completing the square or using the quadratic formula. (3x + 4)(x - 3) = 3x^2 - 5x - 12 Does not equal 3x^2 + 5x - 12
February 7, 2011

Algebra
If your draw a sketch of this you will see that a right triangle can be formed. The base of the right triangle is 37 and the other leg is 23. The hypotenuse is the wire. Using the Pythagorean theorem, c^2 = 23^2 + 37^2 Solve for c
February 7, 2011

Math
The mode of a set of data is the value in the set that occurs most often. 3, 7, 9, 13, 18, 18, 24 In this set of numbers, the mode is 18, because 18 occurs the most times.
February 7, 2011

Math7
From 19C to -3C is 22 degrees difference
February 7, 2011

Math7
x = number of cookies x - (1/2 x + 3 + 2) = 7 x - (1/2 x + 5) = 7 2/2 x - 1/2 x - 5 = 7 1/2 x - 5 = 7 1/2 x = 12 multiply both side by 2 x = 24
February 7, 2011

Algebra 1
3y + 9 = 9 + 3y Commutative Property For addition, the rule is a + b = b + a in numbers, this means 2 + 3 = 3 + 2
February 7, 2011

Geometry
Is DB a line segment? Like this? D------E------B DE + EB = DB Add DE + EB to find DB Are you missing any info from this problem?
February 7, 2011

Math
1/7 + 1/-7 = 1/7 - 1/7 1/7 - 1/7 = ?
February 7, 2011

Algebra
C = number of campers Number of tents = C/3 + 1 T = C/3 + 1
February 7, 2011

math
Forgot to add the reasoning for setting the equation equal to 0. Since S(t) is the salvage value, to find how many years it will take for the saw to depreciate, you would set the equation to 0. This is because savage value would equal 0 dollars when an item was fully depreciated.
February 7, 2011

math
S(t) = -75t + 375 -75t + 375 = 0 -75t = -375 t = 5 years
February 7, 2011

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