Friday

April 18, 2014

April 18, 2014

Number of results: 10,133

**Math**

y+19=9 It means that an unknown number added to 19 is equal to 9. y + 19 = 9 First we need to subtract 19 from both sides of the equation. y + 19 - 19 = 9 - 19 y = -10 The proof: 19 - 10 = 9
*Wednesday, September 21, 2011 at 9:08pm by Ms. Sue*

**Algebra**

first if you have .3 x in both, why multiply by 10? .3 x - .2 y = 4 .3 x + .3 y = 5/19 subtract second from first 0 x - .5 y = 71/19 y = - 142/19 so .3 x - .2 (-142/19) = 40 3 x = -2(142/19) + 760/19 3 x = 476/19 x = 476/57
*Friday, March 6, 2009 at 4:53pm by Damon*

**Math:A.P.**

for AP: term1 = a term3 = a+2d term9 = a+8d but term7 = 19 = a+6d so a = 19-6d so re-defining: term1 = 19-6d term3 = 19-6d+2d = 19-4d term9 = 19-6d + 8d = 19+2d these 3 are supposed to be a GP, so (19-4d)/(19-6d)= (19+2d)/(19-4d) 361 - 152d + 16d^2 = 361 -76d - 12d^2 28d^2 - ...
*Thursday, February 6, 2014 at 9:26am by Reiny*

**Math**

12^19 in prime factored form is 1^18 * 2^19 * 2^19 * 3^19 because 12 = 1x2x2x3 = 1^19 * 2 * 4 * 2^16 * 3 * 3^18 = 1x2x3x4 = 4! since there is no factor of 5, that is as high as we can go so N = 4 (4! divides into 12^19)
*Monday, March 23, 2009 at 6:26pm by Reiny*

**Mat 116**

The last lines... 7(-5)+9(6)=19 -35+54=19 19=19 You made two math errors on yours
*Sunday, April 11, 2010 at 4:52pm by bobpursley*

**math**

3/19-1/19+7/19+x/19=1 x=19-3+1+7 x=16+8 x=24
*Thursday, May 5, 2011 at 1:02pm by Anthony*

**math**

a n = - 2 ( n - 3 ) n = 19 a 19 = - 2 ( 19 - 3 ) a 19 = - 2 * 16 a 19 = - 32
*Thursday, March 1, 2012 at 11:37pm by Bosnian*

**math**

sister has x Ariel has x+19 Victor has 3(x+19) x + x+19 + 3(x+19) = 5x + 76
*Monday, September 10, 2012 at 11:00pm by Steve*

**math**

A little thought should make it clear that since x is farther from 11 than from 19, 1. x is between 11 and 19 2. x > 19 If 11<x<19, x-11 = 3(19-x) x-11 = 57-3x 4x = 68 x = 17 If x > 19, x-11 = 3(x-19) x-11 = 3x-57 2x = 46 x = 23 check: 17 is 6 from 11 and 2 from 19...
*Thursday, January 24, 2013 at 10:36pm by Steve*

**math 121 **

Is 19.x supposed to be 19 x? If you meant to write 19x + 19*6, that can be written 19(x + 6) The * sign indicates multiplication (here,anyway). Do not use a decimal point; it is too confusing.
*Tuesday, January 25, 2011 at 2:25pm by drwls*

**pre-calculas**

well, this one is different anyway -2 x^2 + 6 x + 5 = y find zeros x^2 - 3 y - 2.5 - -y/2 x^2 - 3 y = -y/2 + 5/2 x^2 -3 y + 9/4 = -2 y/4 + 10 y/4 + 9/4 (x- 3/2)^2 = -1/2 (y -19/2) when y = 0 (x-3/2)^2 = 19/4 so x = 3/2 +/- 1/2 sqrt 19 check with quad eqn x = [ -6 +/- sqrt (36...
*Sunday, February 16, 2014 at 10:34am by Damon*

**trig**

H = Hight of lighthouse L = Distance between a ship and a lighthouse tan( theta ) = H / L If 19^ mean 19 then: tan( theta ) = H / L tan( 19 ) = 120 / L L * tan( 19 ) = 120 Divide both sides with tan( 19 ) L = 120 / tan ( 19 ) L = 120 / 0.34433 L = 348.5 ft If 19^ mean 19...
*Saturday, October 1, 2011 at 11:19am by Anonymous*

**math please**

If g ( c ) = 19 - c 2 mean g ( c ) = 19 - c ^ 2 then g ( c ) = 19 - 4 ^ 2 g ( c ) = 19 - 16 g ( c ) = 3
*Thursday, March 1, 2012 at 12:53am by Bosnian*

**Physics**

F = F1 + F2 = -9.5 + 19.5[10o] F = -9.5 + 19.5*cos10 + (19.5*sin10) F = -9.5 + 19.20 + 3.39i F = 9.7 + 3.39i a = X/m = 9.7/21 = 0.462 m/s^2.
*Wednesday, February 19, 2014 at 11:04am by Henry *

**NWSS**

Multiply to get a common denominator: The common denominator must be (v+11)(v+19). Therefore, multiply each part by the missing factor to reach that denominator. v/(v+11)*(v+19)/(v+19) + 1/(v+19)*(v+11)/(v+11) = (v+11)(v+19)/((v+11)(v+19)) Now we have v(v+19)/((v+11)(v+19...
*Monday, July 6, 2009 at 2:39pm by Marth*

**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
*Wednesday, February 9, 2011 at 2:39am by helper*

**Math, Algebra.**

2. Sylvia has 6 1/2 boxes of chocolate to share at a family picnic. If she gives each person 1/3 of a box, how many people can receive chocolate? 13, 17, 19, or 21? I believe that the answer is 19. Take 6 1/2, divided by 1/3, and get 19 1/2. Since 19 is the closest answer, the...
*Tuesday, October 9, 2012 at 9:29pm by -3-*

**calculus**

the height h(t) is h(t) = vt-4.9t^2 h=0 when t=4, so 4v-4.9*16 = 0 v = 19.6 h(t) = 19.6t - 4.9t^2 max h at t=2 because of symmetry h(2) = 19.6*2 - 4.9*4 = 19.6
*Thursday, December 6, 2012 at 11:33pm by Steve*

**Mat 116**

substitution method 7x +9y= 19 x=25-5y ___________ 7(25-5y)+9=19 175-35 +9=19 -175 -175 _______________ -26y= -156 y=6 substitute for x x=25-5y x=25-5(6) x=25-30 x=-5 now substitute 7x+9y=19 7(-5)+ 9(6)=19 -30+56=19 19=19 his part is wrong I believe explain if I need to do ...
*Sunday, April 11, 2010 at 4:52pm by Robin*

**calculus HELP**

Two conditions are the problem here: 1. We cannot divide by zero 2. We cannot take the square root of a negative. so 14/√(x^2 - 361) = 14/√[(x+19)(x-19)] so clearly x cannot be 19 secondly, wouldn't the number under the root sign be negative for all values ...
*Saturday, September 26, 2009 at 11:20pm by Reiny*

**Calculus**

V is total volume leaked first I will do the integral dV/dt = 19e^(2t) V = (19/2)e^2t + C When t = 0 V = 19/2 + C = 0 I assume so C = -19/2 V = (19/2) e^(2t) - 19/2 = (19/2)(e^2t-1) now rectangles with left values at 0, 1, 2, 3 seconds At t = 0, V = 0 dV/dt = 19 integral from ...
*Sunday, November 14, 2010 at 4:32pm by Damon*

**Proofs and numbers**

According to Fermat's Little Theorem: 5^18 = 1 Mod 19 This means that in the exponent you can reduce Mod 18. 120 Mod 18 = 20*6 Mod 18 = 2*6 Mod 18 = 12 Mod 18 5^3 Mod 19 = 125 Mod 19 = (20*6+5) Mod 19 = 6+5 = 11 5^6 Mod 19 = 11^2 = (6*20+1) Mod 19 = 7 5^12 Mod 19 = 7^2 Mod 19...
*Wednesday, November 28, 2012 at 10:50am by Count Iblis*

**physics**

Wb = mg = 2.0kg * 9.8N/kg = 19.6N. = Weight of block. Fb = 19.6N @ 0deg. Fv = 19.6cos(0) = 19.6N. = Force perpendicular to the surface. Fk = u*Fv = 0.42*19.6 = 8.23N. = Force of kinetic friction.
*Thursday, November 24, 2011 at 12:12am by Henry*

**Number Theory.,Math**

clearly (1,1) will work I then made up and ran a silly little computer program where I let a go from 1 to 1000 and b = 1 to 1000 and tested each case (so my program tested 1 million cases) it found the following ordered pairs 1 3 3 1 5 19 7 9 9 7 19 5 testing (19,5) if a = 19 ...
*Thursday, October 10, 2013 at 11:07pm by Reiny*

**physics**

Wo = mg = 2kg * 9.8N/kg = 19.6 N. = Wt. of the object. Fo = 19.6 N @ 0 Deg. Fp = 19.6*sin(0) = 0 = Force parallel to floor. Fv = 19.6*cos(0) = 19.6 N. = Force perpendicular to floor. Fn = Fap - Fp - u*Fv, Fn = 6.3 - 0 - 0.24*19.6 = 1.6 N. = Net force. a = Fn / m = 1.6 / 2 = 0....
*Thursday, January 26, 2012 at 3:16pm by Henry*

**Calculus - Integrals**

Here's my first question: (FIrst part courtesy of Count Iblis) Integral of x sqrt(19x-7)dx ? Write the integral in terms of functins you do know the inegral of. Rewrite the factor of x as follows: x = 1/19 (19 x) = 1/19 (19 x - 7 + 7) = 1/19 (19 x - 7) + 7/19 ^ He wrote this ...
*Sunday, March 16, 2008 at 11:22am by Sean*

**Math**

Compute it mod 13 and mod 19 first. 19^12 = 1 Mod 13 by Fermat's little theorem. And 13^18 = 1 Mod 19 by Fermat's little theorem. So, we can write the answer as: 1*19 (19^(-1) Mod 13) + 1*13 (13^(-1) Mod 19) Mod 19 the first term is zero, the second is 1, while Mod 13 the last...
*Thursday, August 2, 2012 at 5:37pm by Count Iblis*

**math**

I need help solve the equation by fractions 8/(21-y) = 12/(y+19) I think the answer is y = 5, i just need to know how to do work out. i done some solution like this first multiply by(21-y)(y+19)(assuming that y = 21 and y = 19: (21-y)(y+19)8/(21-y) = (21-y)(y+19)12/(y+19) then...
*Thursday, February 23, 2012 at 8:54am by Anonymous*

**statistics help needed**

Poisson statistics is not the only way to do these problems, but it can provide an approximate result for some. For B, the probability is that of no-green 24 times in a row. (36/38)^24 = (18/19)^24 = 0.273 That was easy For A, add the probabilities of getting green 4,5,6...24 ...
*Sunday, February 22, 2009 at 2:20am by drwls*

**physics**

Vo = 19m/s @ 19 Deg. Xo = 19*cos19 = 17.96 m/s. Yo = 19*sin19 = 6.19 m/s. Tr = (Yf-Yo)/g, Tr = (0-6.19) / -9.8 = 0.63 s. = Rise time. a. Tf = Tr = 0.63 s. Tr + Tf = 0.63 + 0.63 = 1.26 s. = Time in flight. b. h = (Yf^2-Yo^2)/2g, h = (0-(6.19)^2) / -19.6 = 1.95 m.
*Tuesday, January 31, 2012 at 4:02pm by Henry*

**probability**

method 1 prob = (19/42)(18/41)(17/40)...(13/36) = .0018677 method 2 prob = C(19,7)/C(42,7) = .0018677 (C(19,7) means 19 choose 7, or 19!/(7!12!)
*Thursday, April 17, 2008 at 11:42pm by Reiny*

**physics**

20.00 cm of space is available. How long a piece of brass at 20C can be put there and still fit at 200C? Brass has a linear expansion coefficient of 19 10^-6/C. 1-19.93 cm 2-19.69 cm 3-19.50 cm 4-19.09 cm
*Monday, February 24, 2014 at 12:35pm by shirly*

**Chem**

1.9 mL x 0.1M NaOH = 0.19 millimols NaOH 8.00 mL x 0.1M HAc = 0.8 mmols HAc. .........HAc + NaOH ==> NaAc + H2O I........0.....0.19.........0......0 added...0.8........................ C......-0.19...-0.19....0.19....0.19 E......0.61......0.......0.19....0.19 (HAc) = 0....
*Monday, May 7, 2012 at 1:07pm by DrBob222*

**math**

(-6 , 19), P(X , Y), (14 , -6). X - (-6)) = 2/5(14 - (-6)), X + 6 = 2/5(14 + 6), X + 6 = 2/5(20), X + 6 = 8, X = 8 - 6 = 2. Y - 19 = 2/5(-6 - 19), Y - 19 = 2/5(-25), Y - 19 = -10, Y = 19 - 10 = 9. P(2 , 9).
*Monday, January 3, 2011 at 10:06pm by Henry*

**math**

Please explain how to get the answer. At the animal shelter, 1/3 of the animals are dogs, 2/12 are cats, and 19 are other animals. How many animals are at the shelter? I said 1/3x + 2/12x + 19 = 4/12x + 2/12x = 19= 6/12x = 19 1/2x = 19 x =
*Thursday, May 13, 2010 at 10:37pm by Sonya*

**math 115**

h(x) = 19-x when x is 5 and when x is -5 I need to write and expression so is this the right way? h(x)=19 h(5)x19 h(5)x 19=-5
*Thursday, September 16, 2010 at 9:31pm by Sydney*

**algebra**

5(11 + 22 - 10) 19 (5 * 23) - 19 = 115 - 19 = 96
*Monday, February 7, 2011 at 10:45pm by Ms. Sue*

**math**

(3 +or- sq.root 361)/2 (3 +or- 19)/2 From here you get the 2 following equations: (3+19)/2 = 11 (3-19)/2 = -8
*Tuesday, March 12, 2013 at 3:56pm by Lena*

**Simplify 2**

19^.5 * 19^.5 = 19^(.5+.5) = 10^1 = 19
*Friday, February 14, 2014 at 6:51pm by Damon*

**algebra**

distribute the 5 first x+9=20x-10 combine like terms 19=19x x= 19/19 x=1
*Monday, August 31, 2009 at 10:01pm by lina*

**ratio**

given the proportion a/b=5/19, what ratio completes the equivalent proportion a/5= / ? a. a/19 b. b/19 c. 5/19 d. 19/b
*Wednesday, March 19, 2014 at 9:44pm by heather*

**Algebra**

x = [ - 19 } (361 + 168) ] / 6 x = [ - 19 } (529) ] / 6 x = [ - 19 } 23 ] / 6 x = 4 / 6 , x = - 42 / 6 x = 2/3 , x = - 7
*Monday, July 28, 2008 at 2:07pm by sugrbare24*

**Math**

y+19=9 That means some number added to 19 equals 9. So we subtract 19 from 9 which gives us -10.
*Wednesday, September 21, 2011 at 9:08pm by Abdul*

**algebra 1 help**

Ok. Also -1 and - 19. The answer then is: -19, -1, 1, 19 Second question List all pairs of numbers that multiply to get -8.
*Wednesday, April 17, 2013 at 7:19pm by rbowh*

**math **

Did the question indicate that the dimensions are in integral centimetres? If so, you only have to figure out the factors of 570, which are 2,3,5,19 Out of these, take any 2 for dimensions, and take the product of the 2 remaining factors as the third dimension. I tried 5,6(=2*...
*Sunday, May 15, 2011 at 3:37pm by MathMate*

**algebra**

since both equations are y = .... set them equal to each other. 10x - 8 = (1/2)x + 5 everybody times 2 20x - 16 = x + 10 19x = 26 x = 26/19 back into one of them y = 10x-8 = 260/19 - 152/19 = 108/19
*Tuesday, November 2, 2010 at 11:30am by Reiny*

**Physics**

Vo=a*t = 4i7 * 0.0475 = 19.8 m/s[59.70]. a. Xo = 19.8cos59.7 = 10 m/s. b. Yo = 19.8sin59.7 = 17 m/s.
*Tuesday, June 18, 2013 at 9:43pm by Henry *

**math**

Ahhh, great question!!!! We know two of the prices, the high and the low, which is a total of $43. So the average price of the remaining 19 books must be > $18 and < $25 (375-43)/19 = 17.5 no good (530-43)/19 = 25.6 no good (175-43)/19 = 6.9 no good (445-43)/19 = 21.1 ...
*Monday, February 18, 2008 at 9:33pm by Reiny*

**general mathematics**

19% = 19/100 = 0.19
*Monday, December 5, 2011 at 1:59pm by Ms. Sue*

**algebra**

19+(21-19)(19-3)/(14-6) = 23
*Tuesday, February 18, 2014 at 3:18pm by Steve*

**geometry**

If the length of the board is 5 feet, we can immediately tell that it should be cut into two pieces, one 3 feet, and the other 2. If the length is 19 feet, we can increase each piece by the proportion of 19/5, thus the lengths are: 3*(19/5) and 2*(19/5) respectively. Can you ...
*Monday, June 7, 2010 at 9:23am by MathMate*

**Math (ceck)**

y = -2 x + b 9 = -2(5) + b 19 = b so y = -2 x + 19 check 9 = -2 (5) + 19 ? 9 = -10 + 19 ? 9 = 9 yes, check
*Tuesday, December 9, 2008 at 10:44am by Damon*

**chemistry**

19% w/w CsCl means 19 g CsCl in a soln of 19 g CsCl + 81g H2O. m = mols/kg solvent. Convert 19 g CsCl to mols and divide by 0.081.
*Thursday, September 13, 2012 at 5:28pm by DrBob222*

**algebra 2**

3t(t+2)-(3t+5t) for t=19 3t(t+2)-(8t) 3(19)*(19+2)-(8*19) 57*21-152 1197-152=1045
*Monday, September 20, 2010 at 9:52pm by Caitlyn*

**college math**

Now here the order of things in the group does not matter so we want the number of combinations of 7 out of 19 C(n,r)= n!/[r!(n-r)!] = 19!/[7!(12!)] =19*18*17*16*15*14*13/(7*6*5*4*3*2) =19*3*17*4*1*13/1 =50,388 check my arithmetic for sure if you have a calculator that does ...
*Wednesday, December 12, 2007 at 9:24pm by Damon*

**Algebra**

First, write down two sets of parentheses to indicate the product. ( )( ) Since the first term in the trinomial is the product of the first terms of the binomials, you enter x as the first term of each binomial. (x )(x ) The product of the last terms of the binomials must ...
*Thursday, May 5, 2011 at 11:40pm by Anonymous*

**algebra**

well p = (5√13)/2 q = (5√13)/2 If p≠q then one is (5+√13)/2 and the other is (5-√13)/2 (5+√13)/(5-√13) = (19+5√13)/6 (5-√13)/(5+√13) = (19-5√13)/6 So, the equation is (x-((19+5√13)/6))(x-((19-5√13...
*Saturday, August 17, 2013 at 5:36pm by Steve*

**Algebra**

9 x + y = 2 -4 x- y = 17 Add ______________ 9 x + ( - 4x ) + y + ( - y ) = 2 + 17 9 x - 4 x + y - y = 2 + 17 5 x + 0 = 19 5 x = 19 Divide both sides by 5 x = 19 / 5 = 3.8 9 x + y = 2 9 * 19 / 5 + y = 2 171 / 5 + y = 2 y = 2 - 171 / 5 y = 10 / 5 - 171 / 5 y = - 161 / 5 y = - 32.2
*Wednesday, April 11, 2012 at 1:18pm by Bosnian*

**Physics !!**

1a. d1 = 0.5g*t^2 = 4.9*2^2 = 19.6 m. = Distance fallen by the 1st stone after 2 s. V1^2 = Vo1^2 + 2g*d V1^2 = 0 + 19.6*19.6 = 384.16 V1 = 19.6 m/s = Velocity of 1st stone after 2 s. d1 = d2-19.6 m. Vo1*t + 0.5g*t^2 = Vo2*t+0.5t^2-19.6 Vo1*t-Vo2*t+4.9t^2-4.9t^2 = -19.6 19.6t-...
*Monday, August 26, 2013 at 8:45am by Henry *

**arithmetic**

This is an arithmetic series You know S19, n=19, d=-3 You don't know "a". S19= (n/2)[2a + (n-1)d] 798 = 19/2(2a + 18(-3)] 1596 = 38a - 1026 2633 = 38a a = 69 So depending on whether your bottom row is the first or the 69th, it would be either 69 or 69 + 18(-3) = 15 check: 69...
*Thursday, February 11, 2010 at 12:53am by Reiny*

**survey math 140**

Number of ways to select 5 of 19 is C(19,5) = 19!/(5!14!) = 11628 most calculators have that function built-in look for something like nCr
*Saturday, March 29, 2014 at 3:37pm by Reiny*

**physics**

here is another way: make it to X1,X2,X3 X1=(1/2)(1.3*19)(19) X2=(1.3*19)(23) X3=(1.3*19)/(0.9)(1/2)(1.3*19) total distance = X1+X2+X3
*Friday, September 14, 2012 at 11:39pm by Eric*

**math exponents**

i need to write each expression as a product of the same factor: * = multiply can you check these please a^2 i got a*a 19^3 i got 19*19*19 -6^2 i got 6*6*-1 -x^3 i got x*x*x*-1 (-5)^4 i got (-5)*(-5)*(-5)*(-5)*(-5) 4^3 i got 4*4*4 -(10)^2 im not sure how to do?? 20^1 i got ...
*Saturday, September 8, 2012 at 1:08pm by marko *

**MATH**

i need to write each expression as a product of the same factor: * = multiply can you check these please a^2 i got a*a 19^3 i got 19*19*19 -6^2 i got 6*6*-1 -x^3 i got x*x*x*-1 (-5)^4 i got (-5)*(-5)*(-5)*(-5)*(-5) 4^3 i got 4*4*4 -(10)^2 im not sure how to do?? 20^1 i got ...
*Saturday, September 8, 2012 at 2:42pm by marko *

**physics**

a. V = Vo + g*t = 19 m/s. 39 - 9.8*t = 19 -9.8t = 19-39 = -20 t = 2.04 s. b. V = Vo + g*t = -19 m/s. 39 - 9.8t = -19 -9.8t = -58 t = 5.92 s.
*Sunday, September 29, 2013 at 8:52pm by Henry *

**calc**

separate it into three integrals 19 dx --> 19 x ---> )19*3 - 19*1 2x^3 dx --> (1/2)x^4--> .5(27-1) -20xdx--> -10x^2-->10(1-9)
*Monday, November 10, 2008 at 4:38pm by Damon*

**grade 11 physics**

I am taking this course and am confused with this question... in the second part to(a),why does 19.6 become negative to get 24.6? If it accelerating upward wouldn't 19.6 be positive making the answer 2(2.5)-19.6 =-14.6N ???
*Sunday, January 24, 2010 at 2:00pm by sarah*

**Algebra**

Try distributing the 19. Also, +(-2) could be written as just w-2 to make it simpler. (19*7)+19w-(19*-2) 133+19w-38
*Monday, September 26, 2011 at 10:45pm by Kai :)*

**math**

If p(x) is the polynomial, then you have: p(x) = (x+2)q1(x) - 19 for some poynomial q1(x). You see that the remainder of -19 is the value of p(x) at x = -2. We also have: p(x) = (x-1)q2(x) + 2 Therefore p(1) = 2. Then if you divide p(x) by (x-1) (x+2), the remainder will be a ...
*Friday, October 12, 2012 at 7:39pm by Count Iblis*

**math**

Your first equation is incomplete, but if you make the final step, your answer will be correct. 1/3x + 2/12x + 19 = x OR 19 = x - 1/3x - 2/12x 19 = x - 2/6x - 1/6x 19 = x - 1/2x = 1/2x 38 = x
*Thursday, May 13, 2010 at 10:37pm by PsyDAG*

**physics**

If the vector is 19 degrees above x axis in quadrant 1 then x component = 52.9 cos 19 y component = 52.9 cos (90-19) = 52.9 sin 19
*Wednesday, March 3, 2010 at 9:19am by Damon*

**math**

g(c)= 19 x c^2 ? is c squared? if not g(4)= 19 x (4x2) g(4)= 19 x 8 g(4)= 152 if C is squared, i am sure you can now derive the answer with this example. simply plug in the input (4) for c
*Thursday, March 1, 2012 at 12:46am by Rose Bud*

**math**

i assume it is read like this: [27/(5+4)] * 19 which is (27/9) * 19 <=> 3*19 = 57
*Wednesday, October 21, 2009 at 4:25pm by Gemini*

**math**

Richard now --- x Rich in 7 yrs -- x+7 Rich 19 yers ago -- x-19 x+7 = 2(x-19) solve for x
*Saturday, October 24, 2009 at 11:19pm by Reiny*

**math**

The correct answer is $19.00, Xavier. If you divide 76 by 4 you get 19 dollars. 76/4=19
*Thursday, March 17, 2011 at 8:56pm by Destiny*

**math**

The correct answer is $19.00, Xavier. If you divide 76 by 4 you get 19 dollars. 76/4=19
*Thursday, March 17, 2011 at 8:56pm by Destiny*

**Math**

a+9b=19 ; a=19-9b--->eq 1 a+2b=-2 --->eq 2 subs eq1 into eq 2 19-9b+2b=-2 19-7b=-2 19+2=7b 21/7=b b=3 subs b=3 into eq 1 a=19-9(3) a=19-27 a=-8
*Sunday, July 28, 2013 at 11:05am by Lola*

**calculus**

find f'(x) for the following: f(x)= cos^5(4x-19) I keep getting 20cos^4(4x-19)sin, but the answer is supposed to be -20cos^4(4x-19)sin(4x-19). I can't seem to get there with derivatives
*Wednesday, March 16, 2011 at 6:39pm by redgy*

**Math**

Trying again using matrices. Let A = |3 4| |2 5| B = |18| |19| x = |x| |y| then Ax=B and x = A-1B The inverse of a general 2x2 matrix is given by A-1 |d -b| |-c a| divided by |A| where A= |a b| |c d| and |A| is the determinant of A = ad-bc So in the given problem, A-1 = |5 -4...
*Wednesday, July 8, 2009 at 4:52pm by MathMate*

**MATHS STATISTICS**

prob(having credit card ) = 1/2 prob(not having credit card ) = 1/2 I assume you want the prob that exactly 19 of the 30 people surveyed have a credit card. If it is something like "at least 19" of the 30, it would become a rather tedious and long question. prob(that 19 of 30 ...
*Monday, May 13, 2013 at 8:55pm by Reiny*

**tudor**

I assume you mean the sum of digits. let the number be xyz where x is 1 (1+y+z)= 1yz/19 Look at the right side. That has to be a whole number, so 1yz is a multiple of 19 I can range from 6 to 9 which means y+z can range from 5 to 8 try 5=y+z or y=5-z which means if z; y; 2;3 3...
*Sunday, February 10, 2013 at 9:06pm by bobpursley*

**chemistry**

a) 19.7g CaCl2/111 = 0.177 moles 0.177 mol/0.200L = ? b) 19.75g/200 mL = how much per 100, so 1/2 x 19.76 = ? c) etc
*Wednesday, February 22, 2012 at 6:30pm by DrBob222*

**Trig **

I will do a) sin(180 + ) = sin180cos + cos180sin = 0 + (-1)sin = -sin for the other two, you will have to know the expansion for cos(180+ ) and tan(180+ ) B) [cos 19, sin 19][cos 54, sin 54] = |[cos 19, sin 19]||[cos 54, sin 54]|cos , where is the angle between ...
*Saturday, April 17, 2010 at 5:58pm by Reiny*

**algerbra**

can you help me check my answer. not sure of the answer. what is value of -27 - 8? a. -35 b. -19 c. 19 d. 19
*Friday, August 10, 2012 at 5:04pm by dudley*

**physics**

ax²+bx+c=0, 14x²-19 x +61 =0, x= [19sqrt{19²+41461}]/214 = =(1961.5)/28. x₁=2.88 m, x₂=-1.52 m
*Tuesday, July 9, 2013 at 11:49am by Elena*

**Statistics**

The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1 day at least once in ...
*Monday, July 8, 2013 at 4:13am by Mike*

**math**

(3*((-5)+7))+((19-7/4) there are mis-matched brackets at the right of the expression, ignoring this type we get = 3(2) + 19 - 1.75 = 23.25 if you want the answer to be 9, you would have brackets in this way: (3*((-5)+7))+((19-7)/4) = 3(2) + 12/4 = 6 + 3 = 9
*Monday, January 20, 2014 at 10:00pm by Reiny*

**Physics**

Correction: mass of the car = 2000kg: NOT 2kg. Fc = 2000kg * 9.8N/kg = 19,600N. Fp = 19,600sin(0) = 0. Fv = 19,600cos(0) = 19,600N. Ff = u*Fv = 0.5 * 19,600 = 9800N. Fn = Fp - Ff = o - 9800 = -9800N. a = Fn/m = -9800 / 2000 = -4.9m/s^2. The remaining calculations are correct ...
*Sunday, July 17, 2011 at 4:09pm by Henry*

**Math**

Hello, find the slope first using the Slope Formula: Y2-Y1/X2-X1 X1=-6 Y1=19 X2=-15 Y2=28 28-19/-15-(-6) 9/-15+6 9/-9 -1 The slope is -1, now use point slope form to determine the equation of the line. Y2-Y1= M(X2-X1) M= Slope X and Y are coordinates above Y-19= -1(X-(-6) Y-19...
*Friday, February 17, 2012 at 12:01am by yoyoma*

**Physics-Please check**

This is a trick question. THe amount of gravitational potential energy stored at the top has to equal the final KEnergy. GPE = mgh= 3kg*9.8*1= 29.4J Now, for folks who are gluttons for punishment, we can do it that way. what is the velocity from falling? Vf^2=Vi^2+2gd= 2*9.8*1...
*Monday, November 1, 2010 at 10:49am by bobpursley*

**Math**

An even simpler method for 2x2 matrices is by determinants. As we have seen above, |A| = 7 we can calculate x and y directly by calculating the determinant of A after replacing the corresponding column of A by the B vector, and dividing by |A|. Thus x= |18 4| |19 5| divided by...
*Wednesday, July 8, 2009 at 4:52pm by MathMate*

**Physics**

Wb = m*g = 2kg * 9.8N/kg = 19.6 N. = Wt. of block. Fb = 19.6N @ 26o. = Force of block. Fp = 19.6*sin26 = 8.59 N. = Force parallel to ramp. Fv = 19.6*cos26 = 17.62 N. = Force perpendicular to ramp. a. Vo = 8 m/s. Yo = 8*sin26 = 3.51 m/s. hmax = (Y^2-Yo^2)/2g. hmax = (0-12.3)/-...
*Wednesday, October 10, 2012 at 2:59pm by Henry*

**Calculus III**

Unless you really have to finish a problem in a hurry, never use integration tables or other tools for problem solving. Only use them to very the solution when you are done. (x^2+100)y'=23 ----> dy/dx = 23/[x^2 + 100] -----> y = Integral of dy = Integral of 23 dx/[x^2 + ...
*Sunday, March 16, 2008 at 7:47am by Count Iblis*

**science**

Vo^2 = Vf^2 - 2g*d. Vo^2 = 0 -(-19.6)*20 = 392. Vo = 19.8 m/s. KE = 0.5m*V^2 = 0.075 * (19.8)^2 = 29.4 Joules.
*Thursday, March 8, 2012 at 6:51pm by Henry*

**physics**

a. R = Xo * T = 19 m. Xo * 2.09 = 19 Xo = 9.1 m/s.=Hor. velocity at which egg was thrown. b. V^2 = Vo^2 + 2g*d. V^2 = 0 + 19.6*1.9 = 37.24 V = 6.1 m/s.
*Monday, September 24, 2012 at 7:21am by Henry*

**pre algebra**

10(-2x + 1) = 19(x + 1) Distribute the 10 and 19 -20x + 10 = 19x + 19 Combine terms -39x = 9 Solve for x x = - 9/39 = -3/13
*Monday, February 21, 2011 at 4:17pm by Helper*

**Statistics**

The Centers for Disease Control (CDC) collects yearly statistics on drinking behavior in the United States by surveying a random sample of U.S. adults. The following data display the percent of adults aged 18 years and over who had 5 or more drinks in 1 day at least once in ...
*Monday, July 15, 2013 at 11:31pm by Rupal*

**physics**

x is the length of unloaded spring F=kΔx F=mg => m₁g=k(0.19-x) m₂g=k(0.75-x) m₁/m₂=(0.19-x)/(0.75-x) x=[0.19m₂ - 0.75m₁]/(m₂ -m₁) = =[0.192.8 0.750.3]/(2.8-0.3) = 0.1228 m k= m₁g/(0.19-x) = 0.39.8/(0.19-0.1228...
*Sunday, July 28, 2013 at 12:57pm by Elena*

**math**

6n^2-19n+15=0 to solve this we can either factor it (if it's factorable) or use quadratic formula,, here we just use quadratic formula: for a given quadratic equation, ax^2 + bx + c = 0, x = [-b +- sqrt(b^2 - 4*a*c)]/(2*a) note: +- is plus or minus where a = numerical coeff of...
*Wednesday, March 23, 2011 at 10:13pm by Jai*

**Geometry**

Vector BA = -4i + 3j Vector BC = -1i + 7j |BA| = sqrt (16+9) = 5 |BC| = sqrt (1 + 49) = sqrt (50)=5sqrt2 BA dot BC = 4+21 = 25 BA dot BC = |BA| |BC| cos ABC so 25 = 5 * 5 sqrt 2 * cos ABC cos ABC = sqrt 2 / 3 = .707 ABC = 45 degrees b L is y = -(3/4) x + 19/4 note slope of ...
*Sunday, May 4, 2008 at 2:12pm by Damon*

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