Saturday

December 10, 2016
Total # Posts: 1,806

**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*

**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*