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October 23, 2014

Posts by Helper


Total # Posts: 1,700

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

math
D = RT (Distance = Rate x Time) R = rate of bike 0.67 = time of bike (2/3 = 0.67) 0.67R = distance of bike R + 12 = rate of car 0.33 = time of ca (1/3 = 0.33) .33(R + 12) = distance of car Since distance is equal 0.67R = 0.33(R + 12) Solve for R, rate of bike
February 7, 2011

math (algebra)
y + x + 4 = 0 x = 1/3 y Substitute x = 1/3 y in, y + x + 4 = 0 y + 1/3 y + 4 = 0 Multiply both sides by 3 3y + y + 12 = 0 4y = -12 y = -3 Check my math
February 7, 2011

problem solving
D = RT (Distance = Rate x Times D = 53.7 * 2.1 D = ?
February 7, 2011

REPORT CARD QUESTION
What are the requirements for first class honors?
February 7, 2011

English 3
Did you read the book? I would start there.
February 7, 2011

3rd grade math
5 cards in 1 hour 25 cards in 5 hours 5/hour + 5/hour + 5/hour + 5/hour + 5/hour = 25 cards/5 hour I'm not sure what a 3rd grader is able to do as far as division or multiplication.
February 7, 2011

Algebra 1
h = 73 700w/h^2 < 25 700w/73^2 700w/5329 < 25 Multiply both sides by 5329 700w < 133,225 w < 190.32 w < 190
February 7, 2011

Economics
Tutors don't do your homework. What exactly do you not understand?
February 7, 2011

geometry
15x - 13 = 90 Solve for x
February 7, 2011

algebra
Budget 80,000---family loan 38,250---small business loan 118,250--Total budget 0.25(118,250) = Budget for rent and utilities 29,563---money spent for rent and utilities (0.25 of 118,250)
February 7, 2011

Algebra 1
If this is the formula (Note h^2 means 'h squared' and use of parentheses) w = 166, h = 73 I = 700w/(h^2) I = 700(166)/(73^2) I = 116,200/5329 I = 21.81
February 7, 2011

math
Volume of a rectangular solid V = Lwh L = 4 m, w = 1.7 m, h = 54 cm = .54 m (100/54) V = 4(1.7)(.54) V = 3.672 m^3
February 7, 2011

Calc
I hit post, just as I realized what you meant. Sorry. Since the parentheses are around the (x), you most likely mean, y = (cubert(x)) + 2.
February 7, 2011

Calc
You need parentheses. Is your problem, y = (cubert(x)) + 2 y = (cubert(x + 2))
February 7, 2011

math
I'm not sure what a vertical math sentence is. Walked on Tuesday----0.25 Walked on Wednesday--1.60 Total walked---------1.85
February 6, 2011

math
Two Angles are Complementary if they add up to 90 degrees. V = angle V 2V - 3 = angle U V + 2V - 3 = 90 3V = 93 V = 31 angle V = 31 angle U = 59
February 6, 2011

Math-Equations
I am sorry. This exact problem has been posted at least 3 times in two days. Here are the equations. These are not easy to solve simultaneously. I used an online calculator for the answer if you need to check your answer. 25x + 35y +54z = 8277 x + y +z = 236 x + -y -z = 0 (in ...
February 6, 2011

Math-Equations
Please check your original post for an answer before reposting. This question has been answered. You were given the equations. Now, it is up to you to solve these equations simultaneously. If you post your answer I will check for correctness.
February 6, 2011

math
Ending Inventory------127,020 Beginning Inventory---105,850 Diff. = Turnover-------21,170 Sold Net Sales-------------423,400 Divided by Units sold--21,170 Per Unit Cost--------------20 I don't know if this is what you need.
February 6, 2011

art
15 marbles into 3 groups 15/3 = 5 3 groups of 5 marbles in each group
February 6, 2011

Calculus
I used r = 2/3 instead of r = 2/3 h! Thanks so much REINY. I really appreciate you taking the time to explain this to me. I am teaching myself calculus, and sometimes the book just doesn't explain things well. The r = 3h/4.5 threw me at first, until I figured out what she ...
February 6, 2011

Calculus
I think you have a mistake. I was working on this problem at the same time. V = 1/3 pi r^2 h Only 'r' is squared. It appears that you squared 'h' too. V = 1/3(pie) (3/4.5h)^2 Anyway, even with squaring h too, I don't come up with 9/64 pi.
February 6, 2011

math
You can leave the same and then subtract the equations. I like to have one equation as addition (+)variables and one equation with negative variables. Then I can add the equation. I know that I am less apt to make a mistake when adding equations as opposed to subtracting ...
February 6, 2011

math
5(7x + 3y = -1.5) = 35x + 15y = -7.5 3(2x - 5y = -30.3) = 6x - 15y = -90.9 35x + 15y = -7.5 6x - 15y = -90.9 Add two equations 41x + 0 = -98.4 41x = -98.4 x = -2.4 7x + 3y = -1.5 x = -2.4 7(-2.4) + 3y = -1.5 -16.8 + 3y = -1.5 3y = 15.3 y = 5.1 x = -2.4, y = 5.1
February 6, 2011

math
Multiply 1st equation by 5, and the 2nd equation by 3. Then add the two equations. This will eliminate the y variable. Take the value you get for x and substitute that value in either equation and solve for y.
February 6, 2011

Math
X = 2 + (1/x) Multiply both sides by x Xx = 2x + 1 Divide both sides by X x = (2x + 1)/X Now, you do the other problem. It's done the same way.
February 6, 2011

Calculus
x = distance of man from base of light y = length of shadow y/(y+x) = 6/18 Solve for y 18y = 6(y + x) 18y = 6y + 6x 12y = 6x y = 6/12 x = 1/2 x Find dy/dx of 1/2 x dy/dx = 1/2 Find derivative with respect to t dy/dt = 1/2 dx/dt x is increasing 3 ft/sec dx/dt = 3 ft/sec dy/dt...
February 6, 2011

math
40 kilometers = 24.8 miles 40 meters = 131.23 feet 4 meters = 13.12 feet 40 cm = 1.31 feet Can you answer now?
February 6, 2011

Math
After 6 yrs, the house decreased. The gains do not offset the losses. After three years the price is down 30% to start with, so the 10% increases are on calculated on a lower value. Do an example. On $50,000, after 6 years the house is down in value approx. 3%.
February 6, 2011

maths
Diameter d = 20 cm Circumference C = pi * d C = 3.14 * 20 = 62.8 cm in one revolution 62.8 cm 100 cm = 1m 62.8/100 = 0.628 m 0.628 m in one revolution 1 km = 1000 m 1000/0.628 = 1592.36 revolutions
February 6, 2011

New Age Math
The two equations, based on your fill-in-the-blanks above are, 25x + 35y + 54z = 8277 x + y + z = 236 Are you sure this is the exact problem as written? Are far as I know, this problem cannot be solved to get an exact number for x, y and z . To solve simultaneous equations in ...
February 6, 2011

math
Triangle ABC AB = x BC = x - 4 AC = 10 angle BAC = 60 deg Using Law of Cosines a^2 = b^2 + c^2 - 2bc cos A (x -4)^2 = 10^2 + x^2 - 2(10)(x)cos 60 x^2 - 8x + 16 = 100 + x^2 - 20x (0.5) x^2 - 8x + 16 = 100 + x^2 - 10x 2x = 84 x = 42
February 6, 2011

geometry
A = 1/2 bh h = altitude h + 4 = base 16 = 1/2 (h + 4)h Solve for h
February 6, 2011

math
Is this your problem? log 10 (1.4 * 10^(-5))
February 6, 2011

Algebra
D = RT, T = D/R 69 = Suzi Rate T = Suzi Time 69T = Suzi Distance 41 = Jim Rate T + 2.73 = Jim Time (T = 112/41 = 2.73) 41(T + 2.73) = Jim Distance Since distances are equal 69T = 41(T + 2.73) 69T = 41T + 111.93 28T = 111.93 T = 3.99 = 4 69T = Suzi Distance 69(4) = 276 miles
February 6, 2011

Algebra
jai's answer is NOT correct -0.075t + 3.85 < 3.7 Add -3.85 to both sides -0.075t + 3.85 + -3.85 < 3.7 + -3.85 -0.075t < -0.15 Divide both sides by -0.075 When dividing by a negative the sense of the inequality reverses t > 2
February 6, 2011

bus math
Loan is $50,000 at 9% for 7 years. Calculate Monthly Payment P = iA/(1 - (1 + i)^-N P = payment amount (per month) i = Interest Rate = 0.09/12 = 0.0075 A = Loan amount = 50,000 N = number of payments = 84 P = 0.0075(50,000)/(1 - (1+0.0075)^-84) P = 375/(1 - (1.0075)^-84) P = ...
February 6, 2011

bus math
Is this simple interest or compounded? If compounded, how? Yearly, quarterly, annually ?
February 6, 2011

ENGLISH HS
I would think you should be more professional. Something along the lines of, Good afternoon, Accounting department, Susan Smith (maybe mention from ABC Corp?)speaking. How may I help you? Maybe not this exactly, but you get the idea. The ending can be simple. It was nice ...
February 6, 2011

Calculus
What is "0 ¡Ü t ¡Ü" ? What is "¡Ü t ¡Ü ¡Þ"? Please check questions after posting. Tutor's can't help if they do not understand the symbols you are using.
February 6, 2011

arithmetic
The nth term of an arithmetic progression is defined by n = a + (n-1)d where, n = the nth term a = the first term d = the common difference Therefore, 58 = 10 + (13 - 1)d 48 = 12d d = 4
February 6, 2011

Calculus
What is "c in 0 ¡Üc¡Ü 1" ? You should always check your question after posting. A tutor can't help if they cannot understand your 'symbols'.
February 5, 2011

math
1.) 9 more than 1/2 the number no more than -8. n = number n + 9 = nine more 1/2 n = half the number no more than -8 (means) <= -8 1/2 n + 9 <= -8 1/2 n <= -17 Multiply both sides by 2 n <= -34 number is 34 (less than or equal -34) 2.) h hours at rate of 55 mi/hr D...
February 5, 2011

math
What is your problem? 2 to 4th power x 2 -2 ? Is this your problem? 2^4 * 2^(-2) If so, 2^4 = 16 2^(-2) = 1/(2^2) = 1/4 2^4 * 2^(-2) = 16 * 1/4 = 16/4 = 4 4 = 2^2
February 5, 2011

math
30 >= -6(5-x) 30 >= -30 + 6x 60 >= 6x 10 >= x x <= 10
February 5, 2011

math
See your later post.
February 5, 2011

algebra
y = 20, 17, 14, 11 x = 1, 2, 3, 4 change in y-- 17 - 20 = -3 14 - 17 = -3 11 - 14 = -3 change in x-- 2 - 1 = 1 3 - 2 = 1 4 - 3 = 1 Slope m = y difference/x difference m = -3/1 = -3 y = mx + b To find b using point (1,20) m = -3 20 = -3(1) + b 20 = -3 + b b = 23 Therefore, the ...
February 5, 2011

algebra
a^6-729 = (a-3)(a+3)(a^2-3a+9)(a^2+3a+9)
February 5, 2011

algebra
x = number of hours 45 + 30x < 25 + 35x Solve for x
February 5, 2011

algebra
Your question is? This can be factored. r^2+ 11r + 30 = 0 (r + 6)(r + 5) = 0 r = -6, r = -5
February 5, 2011

algebra
What is your question?
February 5, 2011

algebra
(bc^2)-^2 Do you mean, (bc^2)^-2 (bc^2)^-2 = b^-2 c^-4 = 1/(c^4 b^2)
February 5, 2011

college algebra
-x^7,-7x^3,-35x^6 GCF = x^3
February 5, 2011

college algebra
6x^3 - 6x^2- x + 1 This can be factored without grouping? (x - 1)(6x^2 - 1)
February 5, 2011

algebra-college
Do you mean (-5x^2)^2 ? If so, (-5x^2)^2 = (-5)^2 x^4 = 25x^4
February 5, 2011

Trigonometry
B = 100, b = 60 < a = 100 When the given angle is obtuse, and the side opposite the given angle is less than or equal to the other given side, there is no solution.
February 5, 2011

Calculus
My question is, What is x 3 -b ? Is this what you mean (5/2)x^3 - b?
February 5, 2011

Calculus
What is your question? "(5/2) x 3-b" What does this represent or mean?
February 5, 2011

math
Perimeter p, w = width, L = length P = 2w + 2L In this case. P = w + 2L w = 10, L = 15 P = 10 + 2(15) P = ?
February 5, 2011

Algebra
Sorry, I forgot the last step. r = +- (sqrt(C/W))
February 5, 2011

Algebra
W = Cr^-2 W = C * 1/r^2 Multiply both sides by r^2 r^2 W = C r^2 = C/W
February 5, 2011

army public
Please put your school subject in the School Subject box. +5 - 2 = +3 per day x = number of days 3x = 20 x = 6.67 days or 7 days
February 5, 2011

Geometry
Please put your school subject in the School Subject box. In a scalene triangle, all sides are unequal.
February 5, 2011

algebra
If this is your problem, (1.5x^3 + 4.8x^2 - 3.7x) - (-4.3x^3 - 4.5x^2 + 32) 5.8 x^3 + 9.3 x^2 - 3.7 x - 32
February 5, 2011

algebra
If you mean, u^(-8) = 1/(u^8)
February 5, 2011

algebra
If your problem is, 54r^(14)/(-3r^7) = -18r^7
February 5, 2011

math
26.000 less 5,000 = 21,000 loan 11% for 36 months A = P * (r * (1 + r)^n)/((1 + r)^n - 1) A = Payment amount/period P = Loan amount = 21,000 r = interest rate = .11/36 = 0.003056 n = number of payments = 36 A = 21,000*(0.003056*(1 + 0.003056)^36 / ((1 + 0.003056)^36 - 1) A = ...
February 5, 2011

Math 156
A rectangle has 4 right angles. I don't know what "four right sides" mean. If you mean right angles, the correct wording would be "four right angles".
February 5, 2011

MATH
x = number of days y = 110 - 2.75x
February 5, 2011

Math
You're welcome :)
February 5, 2011

Math
Solve for ? Solving for x, 6x + 5y = 15 6x = 15 - 5y x = (15 - 5y)/6 Solving for y, 6x + 5y = 15 5y = 15 - 6x y = (15 - 6x)/5
February 5, 2011

Math(Please check)
No, you are not correct. But, you almost had it! To compute the actual increase in profit, first plug in 5, then plug in 6. The difference between f(5) and f(6) is the actual. p(x)= 3x^2 - 5x + 2 p(5) = 3(5)^2 - 5(5) + 2 = 52 p(6) = 3(6)^2 - 5(6) + 2 = 80 p(6) - p(5) = 80 - 52...
February 5, 2011

Math(Please check)
y=sqrt 2x^2 +1 at the point (2,3). No, you are not correct. First, you need to find the derivative of, (sqrt(2x^2 + 1)) dy/dx = 2x(2x^2 + 1)^(-1/2) This is the slope of the tangent line at P. Now plug in P(2,3) 2x(2x^2 + 1)^(-1/2) 2(2)(2(2^2) + 1)^(-1/2) 4(8 + 1)^(-1/2) 4 * (9...
February 5, 2011

Math
dy/dx 2x^(1/2) 2 * 1/2 x^(1/2 - 2/2) 2/2 x^(-1/2) = x^(-1/2) = 1/(sqrt(x))
February 5, 2011

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