Friday

February 12, 2016
Total # Posts: 87

**statistic**

An urn contains white and green balls. Four balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the probability that all balls drawn from the urn are green? Round your answer to ...
*May 8, 2015*

**Math**

(5r - 6s + s2) (13r + 3s - 5s2) 5r x 13r = 65r^2 5r x 3s = 15rs 5r x -5s^2 = -25rs^2 -6s x 13r = -78rs -6s x 3s = -18s^2 -6s x -5s^2 = 30s^3 s^2 x 13r = 13rs^2 s^2 x 3s = 3s^3 s^2 x -5s^2 = -5s^4 Combined like terms: -25rs^2 + 13rs^2 = -12rs^2 -78rs + 15rs = -63rs 30s^3 + 3s^...
*December 12, 2014*

**math (check answer plz)**

Yes! That's correct! 1/5 of 120 1/5 * 120 120/5 = 24
*June 11, 2014*

**Algebra**

(4j^2)^2 (4j^2)(4j^2) = 16j^4
*May 22, 2014*

**math word problem**

Need help setting this up! A corner store has 54 pieces of candy. The number of gumdrops is six less than two times the number of jawbreakers. The number of lollipops is four more than the number of jawbreakers. How many each type of candy?
*March 20, 2014*

**algebra**

(2x)^-6 (1/2x)^6 = 1/64x^6
*March 17, 2014*

**math**

Cost: $200 Selling Price: $275 275/200 = 1.375 Move decimal two places to right: 137.5 Or, Multiply by 100: 1.375 x 100 = 137.5 Next, subtract 100 from 137.5 137.5 - 100 = 37.5% Or, you can just subtract the cost from the selling price then divide answer by cost. Then move ...
*March 15, 2014*

**math (cant figure it out)**

Surface Area A = 2•pi•r^2 + 2•pi•r•h The radius is half the diameter 2(3.14)3^2 + 2(3.14)3•20 56.52 + 376.8 = 433.32 A = 433cm
*March 15, 2014*

**algebra**

9x + y = 11 Solve for y 9x - 9x + y = -9x + 11 y = -9x + 11 Solve for x 9x + y - y = -y + 11 9x = -y + 11 9x/9 = -y/9 + 11/9 x = -y/9 + 11/9
*March 14, 2014*

**Math help**

1.(Y+5)(Y-7)=0 y+5=0 y-7=0 y=0-5 y=0+7 y=-5 y=7 2. 2n(n-20)=0 2n=0 n-20=0 2n/2=0/2 n=0+20 n=0 n=20 3.(2t-3)(3t-2)=0 2t-3=0 3t-2=0 2t=0+3 3t=0+2 2t=3 3t=2 2t/2=3/2 3t/3=2/3 t=3/2 t=2/3 4.(2u+7)(3u-1)=0 Follow above!
*March 4, 2014*

**algebra**

(2,12)and(6,11) Slope Formula: m = y2 - y1 / x2 - x1 11 - 12 / 6 - 2 m = -1/4
*March 4, 2014*

**Alegbra**

a = apples p = pears Two equations 2a + 3p = 345 3a + 5p = 555 Elimination Method 3(2a + 3p = 345) -2(3a + 5p = 555) 6a + 9p = 1035 -6a - 10p = -1110 ________________________ -p = -75 p = 75 2a + 3(75)= 345 2a + 225 = 345 2a = 345 - 225 2a = 120 2a/2 = 120/2 a = 60
*March 2, 2014*

**Algebra**

x = larger number y = smaller number Equations: x - y = 11 x/y = 2 + 4/y Get rid of fractions in second equation by multiplying by y. y(x/y = 2 + 4/y) x = 2y + 4 > plug this into the first equation. Solve for y and then x.
*February 28, 2014*

**Math**

x^2-x-12=0 (x - 4)(x + 3)= 0 x - 4 = 0 x = 0 + 4 x = 4 x + 3 = 0 x = 0 - 3 x = -3
*February 27, 2014*

**Alegbra**

Set up two equations a = adults c = children 70a + 40c = 27750 a + c = 450 Solve by substitution or elimination Substitution: 70a + 40c = 27750 a = 450 - c Elimination: 70a + 40c = 27750 -70(a + c) = -70(450)
*February 27, 2014*

**Alegbra**

d = dimes q = quarters Equations: 10d + 25q = 285 d + q = 15 Solve by substitution or elimination Substitution: 10d + 25q = 285 d = 15 - q Elimination: 10d + 25q = 285 -10(d + q) = -10(15)
*February 27, 2014*

**Alegbra**

d = desk c = chair Equation: d + c = 200 d = 4c
*February 27, 2014*

**Alegbra**

Equations: Substitution y = 2a + 3p = 345 y = 3a + 5p = 555
*February 27, 2014*

**Alegbra**

Equations: Substitution x + y = 30 x = y - 2
*February 27, 2014*

**HELPPPP**

You have four colors to choose from, with black and green being the highest. So I added those two and subtract from the total amount of marbles. If you was to pick one of each color, you still have one pick left, guaranteeing two of the same color. Right? Maybe someone else ...
*February 23, 2014*

**algebra**

-5y - 9 = y - 1 -5y - y - 9 = -1 -6y - 9 + 9 = - 1 + 9 -6y = 8 -6y/-6 = 8/-6 y = -4/3 Are you sure you have the right equation? If the equation said: 5y + 9 = (y + 1), y would equal -2 5y - y + 9 = 1 4y + 9 - 9 = 1 - 9 4y = -8 4y/4 = -8/4 y = -2
*February 23, 2014*

**Math**

3 dozens = 36 Markup is 30% of selling price Original selling price of each camcorder? 100% + 30% = 130% Change 130% into a decimal, then multiply by 5040 5040 x 1.30 = 6552 Now divide 6552 by 36 6552/36 = 182 Each camcorder cost $182.00
*February 22, 2014*

**Algebra**

1/3x + 1/4y = 7 1/3x - 3/4y = -9 Make one of the equations negative to eliminate the x's. -(1/3x + 1/4y) = -(7) -1/3x - 1/4y = -7 1/3x - 3/4y = -9 ____________________ -y = -16 y = 16 Now solve for x. Use either equation. 1/3x + 1/4(16) = 7 1/3x + 4 = 7 Eliminate the ...
*February 22, 2014*

**Math**

Order Of Operation: 1. Parenthesis 2. Multiplication 3. Subtraction 72 - 5(13 + 2)* 5 (15) 5(15)* 5 75 * 5 375 72 - 375 = -303
*February 22, 2014*

**math**

Equation: d = denominator n = numerator d = 2n - 4 Plug in numbers for n 2*3-4=2 2*6-4=8 2*9-4=14 2*12-4=20 n = 12 d = 20 Fraction: 12/20
*February 11, 2014*

**Math**

x = larger number y = smaller number x = 3y x - y = 60 Substitution Method: 3y - y = 60 2y = 60 2y/2 = 60/2 y = 30 Solve for x x = 3(30) x = 90 90 - 30 = 60
*January 24, 2014*

**Fractions**

4 divided by 2/3 4 _______ 2/3 Rewrite so you can see it better. 4 over 1 divided by 2 over 3. 4 2 ___ / ____ = 1 3 Take the reciprocal 2/3 4 3 12 ___ x _____ = ______ = 6 1 2 2 Answer: 6 Check: 2/3 of 6 2 6 12 __ x ___ = ___ = 4 3 1 3
*January 24, 2014*

**algebra**

slope=4, y-intercept=-3 y = 4x - 3 slope=2/5, (10,3) is on the line y = mx + b 3 = 2/5(10) + b 3 = 4 + b 3 - 4 = 4 - 4 + b -1 = b y = 2/5x - 1
*January 23, 2014*

**algebra**

(8,-2) and (4,-4) are on the line Find slope: m = y2 - y1/x2 - x1 -4 - (-2)/4 - 8 = -2/-4 = 1/2 m = 1/2 Use either point to find y-intercept. y = mx + b -4 = 1/2(4) + b -4 = 2 + b -4 - 2 = 2 - 2 + b -6 = b y = 1/2x - 6
*January 23, 2014*

**algebra**

2a+2b _______ = 5c z 2a + 2b = (z)5c 2a = -2b + 5cz 2a/2 = -2b/2 + 5cz/2 a = -b + 5cz/2
*January 23, 2014*

**Math**

Just put the x and y values into the expression. 4(6)+5(17) 4 x 6 + 5 x 17 24 + 85 = 109
*January 22, 2014*

**Algebra 1**

x = games won y = games lost Write two equations: x + y = 96 x = 2y Substitute the second equation into the first equation: 2y + y = 96 3y = 96 3y/3 = 96/3 y = 32 Solve for x. Put y value in either equation: x = 2(32) x = 64
*January 22, 2014*

**math**

Thanks, Ms. Sue! Now I see!
*January 22, 2014*

**math**

6,12,9,18,15,30,60 6 x 2 = 12 9 x 2 = 18 15 x 2 = 30 30 x 2 = 60
*January 22, 2014*

**Math**

Yes!
*January 22, 2014*

**Introductory to algebra**

4x+2-3x=4+1 4x + 2 - 3x = 5 4x + -3x = x x + 2 = 5 x + 2 - 2 = 5 - 2 x = 3
*January 20, 2014*

**math**

(3*((-5)+7))+((19-7)/4) (-5+7=2) (19-7=12 > 12/4=3) 3 * 2 + 3 = 9 Yes!
*January 20, 2014*

**math**

LCM Solve by writing the multiples. 8 > 8,16,24,32,40,48,56,64,.... 10 > 10,20,30,40,50,60,...... Solve by prime factorization. 8 10 / \ / \ 2•4 2•5 \•/\ 2•2•2 2•2•2•5 = ?
*January 20, 2014*

**algebra1**

(3^-2) ___________ p 1/3^2 ___________ p 1/9 _______ = p 1/9 _______ = p/1 Take the recipical 1/9 * 1/p = 1/9p
*January 20, 2014*

**Algebra**

f = father g = Gustav Write two equations. f = 7g f - 1 = 9(g - 1) Substitute first equation into second. 7g - 1 = 9g - 9 7g - 9g -1 + 1 = 9g - 9g - 9 + 1 -2g = -8 -2g/-2 = -8/-2 g = 4 Substitute g value in either equation. f = 7(4) f = 28 Check: One year ago..... f is 27 and ...
*January 19, 2014*

**Math**

t(6) = -3 t(11) = -13 -3 - (-13) = 10 10/5 = 2 Go one term back from last term to find term 1. t(10) = 10(2) + -13 = 7 t(1) = 7 Now you can find term 0 7 + 2 = 9 t(0) = 9 Common difference is: d = -2 Equation: tn = -2n + 9 t(1) = 7 t(2) = 5 t(3) = 3 t(4) = 1 t(5) = -1 t(6) = -...
*January 18, 2014*

**Math**

x = larger number y = smaller number Write two equations, then do the substitution method. x + y = 53 x = y + 13 y + y + 13 = 53 2y + 13 = 53 2y + 13 - 13 = 53 - 13 2y = 40 2y/2 = 40/2 y = 20 Now solve for x. You can use either equation. x = 20 + 13 x = 33
*January 18, 2014*

**maths**

1/4 + 3/4 + 7/15 = ? 1/4 + 3/4 = 4/4 4/4 = 1 1 + 7/15 = 15/15 + 7/15 = 22/15 22/15 = 1 7/15
*January 15, 2014*

**Math**

y = 1/2x + 3 Slope: m = 1/2 y-intercept is when x = 0 y = mx + b y = 1/2(0)+3 y = 0 + 3 y = 3 y-intercept is 3 x-intercept is when y = 0 0 = 1/2x + 3 > move 1/2x to the left and change sign. 0 -1/2x = 3 -1/2x = 3 > divide on both sides by -1/2 x = -6 x-intercept is -6 ...
*January 11, 2014*

**Math**

(-1,4) (-5,2) Slope: m = y2 - y1/x2 - x1 2 - 4 / -5 - (-1) = -2/-4 m = 1/2 Equation: y - y1 = m(x - x1) y - 4 = 1/2(x - (-1)) y - 4 = 1/2(x + 1) y - 4 + 4 = 1/2x + 1/2 + 4 y = 1/2x + 9/2
*January 8, 2014*

**Ms. Sue Math Help Please**

The difference of a number and ten (x - 10) The product of three 3 x (x - 10) Is 15 3 x (x - 10) = 15 3(x - 10) = 15 3x - 30 = 15 +30 +30 __________________________ 3x = 45 ____ ____ 3 3 x = 15
*January 8, 2014*

**math**

-3(4 - 2g)- 6 -12 + 6g - 6 -18 + 6g or 6g - 18
*January 8, 2014*

**Math**

1.) f(x) = -2x + 1; {-6, -2, 0} -2(-6) + 1 = 13 -2(-2) + 1 = 5 -2(0) + 1 = 1 range: {13, 5, 1} 2.) f(x) = x^3 + 1; {-2, -1 3} -2^3 + 1 = -7 -1^3 + 1 = 0 3^3 + 1 = 28 range: {-7, 0, 28}
*January 7, 2014*

**Math help :(**

2(x-3) = 2x 2x - 6 = 2x Move 2x to the left side and change sign. Then put zero after the equal sign. 2x - 2x - 6 = 0 2x's cancels out. 0 = 6 No Solution ________________________________ 3(y - 3)= 2y - 9 + y 3y - 9 = 3y - 9 Move 3y to the left and -9 to the right and ...
*January 6, 2014*

**math**

k = Kristyn m = Mario k = m -4 (k + 3)= 2/3(m + 2) Substitute the value of k in the second equation. m - 4 + 3 = 2/3m + 4/3 m - 1 = 2/3m + 4/3 ELIMINATE FRACTION BY MULTIPLYING THE EQUATION BY 3. 3(m - 1) = 3(2/3m + 4/3) 3m - 3 = 2m + 4 3m - 2m - 3 + 3 = 2m - 2m + 4 + 3 m = 7 ...
*January 6, 2014*

**algebra 2 honors**

2x^2 - 12x + 32 = x^2 Move x^2 to the left side and change sign then put zero after equal sign.. 2x^2 - x^2 - 12x + 32 = 0 x^2 - 12x + 32 = 0 (x - 4)(x - 8) = 0 x - 4 = 0 x - 8 = 0 x - 4 + 4 = 0 + 4 x - 8 + 8 = 0 + 8 x = 4 x = 8 x = 4,8
*January 5, 2014*

**maths**

Total Cost: $12.50 > old price Selling Price: $16.75 > new price (selling price - total cost)/ total cost 16.75 - 12.75 = 4.25 4.25/12.50 = 0.34 > move decimal two places the right, or multiply 0.34 x 100 Answer: 34%
*January 5, 2014*

**math**

smallest 4 digit > 1234 largest 3 digit > 765 1234 - 765 difference > 469
*January 5, 2014*

**math**

Yes, To get a percent to a decimal, just move decimal point two places to the left. Or, you could divide 700/100.
*January 5, 2014*

**Algebra**

y = 8 - x 7 = 2 - y Substitute the first equation into the second. 7 = 2 - (8 - x) 7 = 2 - 8 + x 7 = -6 + x > subtract 6 on both sides 7 + 6 = -6 + 6 + x 13 = x
*January 4, 2014*

**Math**

1.25x + 0.75y = 109.75 x + y = 105 > x = 105 - y Put x value in the first equation; 1.25(105 - y) + 0.75y = 109.75 131.25 - 1.25y + 0.75y = 109.75 131.25 - 0.5y = 109.75 -131.25 -131.25 ___________________________________ -0.5y = -21.5 ______ _______ -0.5 -0.5 y = 43 Now ...
*January 4, 2014*

**Mathematics**

Percentage Increase (New - Old)/(Old) 450 - 415 = 35 35/415 = 0.084337....... Move decimal point two places to the right. 8.4%
*January 3, 2014*

**maths**

x - 4 = 2 - x + x + 4 +4 + x ____________________________ 2x = 6 2x/2 = 6/2 x = 3
*January 3, 2014*

**math**

2,4,8,16,...... This is a geometric sequence. That means the same number is multiplied, which is 2. You could calculate this way; {a, ar, ar^2, ar^3, ar^4, …..} 2, 2x2 2x2^2 2x2^3 2x2^4 (2, 4, 8, 16, 32, ...) a = the 1st term. common ratio = 2 > the factor between ...
*January 3, 2014*

**algebra**

third term is 14 and ninth term is -1 14 - 2.5 = 11.5 > 4th term 11.5 - 2.5 = 9 > 5th term 9 - 2.5 = 6.5 > 6th term 6.5 - 2.5 = 4 > 7th term 4 - 2.5 = 1.5 > 8th term 1.5 - 2.5 = -1 > 9th term The terms are decreasing by 2.5 > (-2.5) To go from one term to ...
*December 17, 2013*

**Business Ethics**

A manager refuses to reveal company secrets despite an offer of handsome kickbacks. Which of the following reasons justifies her action if she were to subscribe to Kohlber's preconventional level of moral reasoning?
*January 1, 2013*

**Calculus 1**

once again the formula doesnt help me if i dont understand the identities.
*October 15, 2012*

**Calculus 1**

i am having problems with the trig identities that and how to solve with sin squared. i have the formula. that hasn't helped me with the identities.
*October 15, 2012*

**Calc**

(3t^4-3)^2(4t^6+4t^3)^4+(t^4-1)^3(12t^4+12t)^3 but i'm not sure if this is a simple as it gets.
*October 15, 2012*

**calculus**

Differentiate: f(x)=(secx)/[1+sec(x)]
*October 15, 2012*

**calculus**

differentiate: g(t)=tˆ3cos(t)
*October 15, 2012*

**Calclus**

i got [2tˆ(1/3)]+[(10tˆ4)ˆ4
*October 15, 2012*

**Calclus**

What is the derivative (tˆ2)ˆ(1/3)+2(tˆ5)ˆ(1/2)
*October 15, 2012*

**Calculus**

What is the derivative of R(x)=(√7)/(xˆ10)
*October 15, 2012*

**Calculus**

suppose y=√(2x+1), where x and y are functions of t. a)if dx/dt=3, find dy/dt when x=4 b)if dy/dt=5, find dx/dt when x=12
*October 12, 2012*

**Calculus**

The length of rectangle is increasing at a rate of 8cm/s and its width is increasing at a rate of 3cm/s. When the length is 20cm and the width is 10cm, how fast is the area of the rectangle increasing?
*October 11, 2012*

**calculus**

Make a singn diagram for the derivative of the function f(x)= (x-1)^4
*October 10, 2012*

**Algebra**

"A recent study determined that the distance employees at a pharmaceutical company in New Jersey commute to work each way is normally distributed with a mean equal to 13.4 miles and a standard deviation of 3.6 miles. Management has decided to give a year-end bonus to ...
*August 14, 2011*

**statistics**

so only 7.08 % of employees would be entitled to the bonus?
*August 14, 2011*

**physics**

if an object has a mass of 17 kg what is approximate weight on earth
*June 8, 2011*

**hawthrone**

if an object has a mass of 17 kg what is approximate weight on earth
*June 8, 2011*

**geometry**

The diagonal of a rectangle measures 26 cm the width of the rectangle is 24 cm find the length of the rectangle.
*March 26, 2011*

**math**

x - 5/6 = 1/10 30(x - 5/6) =30(1/10) 30x - 25 = 3 30x - 25 + 25 = 25 + 3 30x = 28 30x/30 = 28/30 x = 28/30 x = 14/15
*January 13, 2011*

**algebra1**

-3 + 8x - 8 = -8 -11 + 8x = -8 -11 + 11 + 8x = -8 + 11 8x = 3 8x/8 = 3/8 x = 3/8
*November 30, 2010*

**Math**

How much foil is required to cover a rectangular box that is 4 in by 8 in by 5 in?
*November 28, 2010*

**HMS 230**

please can someone answer this i have to turn it in today!!!..ive tried everything nd i cant seem to get the answer im desperate here!!!!
*April 20, 2010*

**HMS 230**

What method of ethical oversight (such as a code of ethics, an ethics advisory board, oversight by the board of directors, or an ethics audit) would you suggest for Acre Woods Retirement Community as described in the case study in Appendix D?
*April 20, 2010*

**hum 205**

You are in charge of marketing and advertisement at your local art museum. Next month, the museum will be hosting an exhibition on the social role of the arts in early Chinese and Japanese civilizations. · Create a 2-page, informative newspaper advertisement for the ...
*February 24, 2010*

**college**

somebody pleeeeeeaaaaassssseeee answer!!!??????!!!!???
*February 12, 2010*

**college**

How do factors such as geography/environment, culture and history influence politics in different countries and regions?
*January 29, 2010*

**Math ....urgent help**

-5x - 4y = -11 10x = -6 - y For the second equation, move -y to the left side and change sign to positive. -5x - 4y = -11 10x + y = -6 Now you are either going to eliminate the x's or y's first. If it is x's, then multiply the first equation by 2. If it is y's...
*January 7, 2009*

**General Study**

your no help at all
*November 23, 2008*

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