Thursday

October 27, 2016
Total # Posts: 1,799

**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*

**math**

Correct

*February 5, 2011*

**math**

Correct

*February 5, 2011*

**intermediate algebra**

Correct

*February 5, 2011*