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September 20, 2014

Posts by Helper


Total # Posts: 1,700

college 209
multiply (2 sqrt 7 -5 sqrt 3)(8 sqrt7-5 sqrt 3) (2 sqrt 7 -5 sqrt 3)(8 sqrt7-5 sqrt 3) 112 - 50(sqrt 21) + 75 187 - 50(sqrt 21)
January 16, 2011

college 209
square root of ? '2a7' means? does it mean 2(sqrt7)?
January 16, 2011

college 209
what does the ~ over the a mean? does '2a7' mean 2a^7 ('a' to the 7th power) ?
January 16, 2011

math
0.5x + 2 = 0.2x - 7 subtract 0.2x from both sides 0.3x + 2 = -7 0.3x = -9 x = -30
January 16, 2011

algebra
uã6w^3 + wã96wu^2 6w^2 au (w + 16u)
January 16, 2011

math
15% = .15 .15 * 100 = ?
January 16, 2011

Math/Trig
Area K = 1/2 r^2 * angle in rads Convert deg to rads 55 deg * pi/180 = 55pi/180 = 11pi/36 rads 11pi/36 rads = .96 rads K = 1/2 (5.7)^2 * .96 K = ?
January 16, 2011

Math/Trig
Arc length = r * central angle in rads 95 d = 95*pi/180 = 95pi/180 = 19pi/36 19pi/36 = 1.66 rads Arc length s = 2.5 * 1.66 Arc length s = ?
January 16, 2011

math
I'll do the first to get you started, you try the others and post back and someone will check your answers a. 3/2 x^5 'x’ raised to the power ‘5’, this means the equation is a 5th degree equation. the coefficient is number before the variable, in this ...
January 16, 2011

Algbra
3/5k - (k + 1/3) = 1/15 (k + 3) remove ( ) 3/5k - k - 1/3 = 1/15k + 3/15 get rid of denominators since 15 is the LCD of 5, 3, 15 multiplying both sides by 15 will do this 15 (3/5k - k - 1/3) = 15(1/15k + 3/15) 9k - 15k - 5 = k + 3 -6k - 5 = k + 3 -7k = 8 k = -8/7
January 16, 2011

math
I = PRT R = I/PT I = 20(196) - 3500 I = 3920 - 3500 I = 420 T = 20 mo/12 T = 1.667 yr R = I/PT R = 420/(3500 * 1.667) R = 420/5834.5 R = .071986 R = 7.2% check I = PRT I = 3500 x 7.2% x 1.667 yr I = 252 x 1.667 I = 420.084 I am not a tutor
January 16, 2011

algebra
1 < 3x+5 < 12 -4 < 3x < 7 -4/3 < x < 7/3
January 16, 2011

math
monitor A 22:12:06 monitor B 22:54:07 diff. = 42:01 42 min 1 sec = 42 + 1/60 42 min 1 sec = 42.01667 min 42.01667/60 = 0.700278 hr R = D/T R = 62/.700278 R = 88.53627 km/hr R = 88.54 km/hr check D = RT D = 88.54 x .70 D = 61.978 62 = 61.978 I am not a tutor
January 16, 2011

Geometry
Area = s^2 A = 8^2 A = ?
January 16, 2011

algebra
you need to use brackets to show what is under the radical
January 15, 2011

math
first find the LCD then solve as you would simultaneous equations in three unknowns try it and post back if you need more help
January 15, 2011

math
are you missing something 16x + 13z = ?
January 15, 2011

algebra
(sqrt(6x + 6)) = (sqrt(x + 12)) square both sides 6x + 6 = x + 12 5x = 6 x = 6/5 without the use of ( ) I assumed sqrt of (6x + 6) and sqrt of (x + 12)
January 15, 2011

algebra 1
The equation of the straight line having slope m and y intercept b is y = mx + b m = 6.7 b = -7 y = 6.7x - 7
January 15, 2011

college math 209
u - 18 = 2 u = 20
January 15, 2011

college math 209
is this the equation ?, 2(sqrt5) + 3/(sqrt5) - 1 2(sqrt5) + 3(sqrt5)/5 - 1 to get rid of the radical in 3/(sqrt5). multiply 3/(sqrt5)*sqrt5/sqrt5 = 3(sqrt5)/5
January 15, 2011

algebra 1
the point would be (0,-3) for the graph plot the point and draw a line through it, this will be a line at y = -3, -3 units below and parallel to the x-axis
January 15, 2011

ALGEBRA
the rate is 15%
January 15, 2011

6th grade math
yes, you are correct
January 15, 2011

statistics
question? you are missing part of the problem
January 15, 2011

Geometry
Sum of measures of interior angles of a polygon of n sides = (n - 2 )*180 deg polygon with 4 sides, n = 4 (n - 2)*180 (4 - 2)*180 2*180 = 360
January 15, 2011

math
want do you need to find? this problem is not complete
January 15, 2011

Math
x = number of graph notebooks y = number of college ruled notebooks 2.64x = total value sold graph notebooks 3.61y = total value sold college notebooks x + y = 50 2.64x + 3.61y = 168.86 Solve these 2 equations together by elimination or substitution method I will use ...
January 15, 2011

algebra
I made the correction below let her regular rate be $x per hour let her overtime rate be $y per hour first week: 40x + 7y = 390 2nd week: 42x + 8y = 416 1st equat x 8 ---> 320x +56y = 3120 2nd equt x 7 ---> 294x + 56y = 2912 subtract 26x = 208 x = 8 substitute x = 8 40x...
January 15, 2011

algebra 2
ln(e^18x) = 9 Since, ln e^x = x ln e^18x = 18x 18x = 9 x = 2
January 15, 2011

geometry
not enough info posted to answer are RS and ST parts of RT ? Not sure if this pic will print right. Ignore if it doesn't. R------------S-------------T 12 13 What is A ?
January 15, 2011

mgt
who is "her" ?
January 14, 2011

Math
you have to draw a picture for this. If I did it right, I would think you would want the water line to run in a straight line from MW. To find the point on the water main, step 1--I wrote the equation of the line from M to W, using the given points. Equation MW - y = 4x - 6 ...
January 14, 2011

math
you're welcome
January 14, 2011

math
if you can picture this, it forms a rt triangle with the shortest leg 2, the longer leg 3, and you are looking for the hypotenuse. So, h^2 = 2^2 + 3^3 h^2 = 4 + 9 h^2 = 13 h = sqrt 13
January 14, 2011

geometry
V = Lwh the volume (given) = 24 ft^3 the height (given) = 18" = 1.5' 24 = L*w*1.5 divide both sides by 1.5 16 = Lw You need to find the number of feet in each side of the base since the box has a square base L = W AND, found above, L*w = 16 which of the above answers...
January 14, 2011

business math
you didn't give a time limit for the $20,000, so I'll assume 5yrs FV = PMT * (((1 + i)^n - 1)/i ) x = amt of PMT i = rate n = no. of payments i = .08/4 quarters = .02 n = 4 * 5 yr = 20 payments 20,000 = x *((1 + .02)^20 - 1 )/.02 20,000 = x *(( 1.02 )^20 - 1)/ .02 20,...
January 14, 2011

algebra
| x - 8 | < 14 this means x - 8 < 14 x < 22 -x + 8 < 14 -x < 6 x > -6 therefore, -6 < x < 22
January 14, 2011

Math/Trig
Area K = 1/2 r^2 * angle in rads Convert deg to rads 125 deg * pi/180 = 25pi/36 rads K = 1/2 * 3^2 * 25pi/36 K = ? m^2 you do the math Area K is expressed in m^2 (in this case)
January 14, 2011

Algrebra II-please check my answer
1. (-9/7, 0) you are correct 2. correct, but should be written as 2 <= x <= 8
January 14, 2011

geometry
30-60-90 special triangle has sides in the ratio of 1 : sqrt 3 : 2 (a:b:c) sin A = a/c = 1/2 hypotenuse = c = h side a = h - 12 (opposite 30 deg angle) set-up a ratio 1/2 = (h - 12)/h cross multiply h = 2(h - 12) h = 2h - 24 -h = -24 h = 24 hypotenuse = 24 side a (opposite 30 ...
January 14, 2011

algebra
x^2 - x - 6 list factors of -6, -6 x 1 = -6 6 x -1 = -6 -3 x 2 = -6 3 x -2 = -6 which factors of -6, when added, = -1 -6 + 1 = -5 N0 6 + -1 = 5 NO -3 + 2 = -1 YES x^2 - x - 6 = (x - 3)(x + 2) x^2 - 5x - 24 list factors of -24, -24 x 1 = -24 24 x -1 = -24 -12 x 2 = -24 12 x -2...
January 14, 2011

algebra
yes, you are correct
January 14, 2011

geometry
is this a triangle, square, rectangle or ? are AB, ST, AC sides, medians, or ? are A, T angles ?
January 14, 2011

symbols
assuming all the men take the same amount of time to milk each cow, 53 cows / 4 men = 13.25 cows each since you can't milk a fraction of a cow three men would milk 13 cows each and one man would milk 14 so the answer would be no, each man does not milk the same number of ...
January 14, 2011

Algebra
see you post below, I showed you there
January 14, 2011

Algebra
(1) x + y = 105 (2) 3x + 1.5y = 250 multiply equation (1) by -3 -3 (x + y = 105) = -3x - 3y = -315 add the two equations together -3x - 3y = -315 3x + 1.5y = 250 0 - 1.5y = - 65 -1.5y = -65 y = 43.33 student tkts x + y = 105 x + 43.33 = 105 x = 61.67 student tkts are you sure ...
January 14, 2011

Algebra
x = adult tkts y = student tkts 3x = value of adult tkts 1.5y = value of student tkts x + y = 105 3x + 1.5y = 250 solve these equation together for your answer post back if you need more help
January 14, 2011

8th grade math
not enough info to solve this,
January 13, 2011

Pre-Calculus
3. 30-60-90 special triangle draw this out to see that you need to find side a (shorter side) of triangle ABC 30-60-90 triangle have sides in the ratio of 1 : sqrt 3 : 2 (a : b : c) Since side b = 10 cos 30 = b/c = 10/c since ratio of b/c = sqrt 3/2 sqrt 3/2 = 10/c cross ...
January 13, 2011

Pre-Calculus
I think the tutors like you to post each problem as a separate post.
January 13, 2011

trigonometry
my trig book has tables in degrees and minutes for example, look-up sin 24 deg 40 min and sin 24 deg 50 min. cal. the correction and add to the smaller angle for sin, tan, sec (subtract the correction for cos, cot, csc) sin 24d 40' = .4173 sin 24d 50' = .4200 ...
January 13, 2011

3 G Math
9 x 8 x any number = 72 x any number 2 x 9 x 4 = 72 the second one the FINAL answer is 72 the first one will be higher if you multiply 72 by any other number but 1, because 72 x 1 = 72, then they will be equal but if any number is greater than 1, then the first will be higher ...
January 13, 2011

4th grade
you have to post the question you need help with
January 13, 2011

Geometry
I can't believe I didn't think to do it your way!!! so much easier to do AND understand that's why you are the tutor thank you I've learned so much from your posts! I wish I had you to ask questions when I was taking math.
January 13, 2011

Geometry
I don't understand what you are asking use this formula TA = 2Lw + 2Lh + 2wh use these dimensions 1st use, L = 2, w = 3, h = 4 then quadruple the dimensions to compare how the area changed 2nd use L = 8, w = 12, h = 16 (I quadrupled the dimensions for you) you can use any ...
January 13, 2011

Geometry
I'll do volume to show you V = L*w*h 1st example, L = 2, w = 3, h = 4 V = 2*3*4 V = 24 Quadruple each dimension, L = 2*4 = 8, w = 3*4 = 12, h = 4*4 = 16 V = 8*12*16 V = 1536 So, the volume went from 24 to 1536 1536/24 = 64 so 24*64 = 1536 So, if you quadruple the ...
January 13, 2011

geometry
Sum of measures of interior angles of a polygon of n sides = (n - 2)*180 deg. parallelogram = 4 sides so, n = 4 (4 - 2)*180 2*180 = 360 deg in a parallelogram can you answer this now?
January 13, 2011

Geometry
so, this means that you cannot have two obtuse angles
January 13, 2011

Geometry
there are 3 angles in a triangle that = 180 deg. an obtuse angle is > 90 deg but < 180 if you have two obtuse angles of 91 deg ea then, 180 - ( 91 + 91 )= ? so, what is the answer then
January 13, 2011

FAST MATH HELP
you posted this 2 times below please check there for an answer before posting again I answered this same question 2 times below where you asked the first time
January 13, 2011

To Helper
you're welcome
January 13, 2011

To Helper
I don't know how to solve using 2 equations, but I can solve it using one equation n = $2.00 coins 5n - 8 = $1.00 coins 2.00n = value of $2.00 coins 1.00(5n - 8) = value of $1.00 coins 2.00n + 1.00(5n - 8) = 160.00 2.00n + 5.00n - 8.00 = 160.00 7.00n = 168.00 n = 24 24 ...
January 13, 2011

3rd grade math
this is answered above. see your 2nd post of this
January 13, 2011

3rd grade math
answered above in your 2nd post
January 13, 2011

MAATH
Ax + By = C x + 3y = 1 is in this form already 2x + 4y - 12 = 0 2x + 4y = 12
January 13, 2011

math
x/3 * 5/8 = 5/12 5x/24 = 5/12 cross multiply 60x = 120 x = ?
January 13, 2011

algebra
x = number of child's plates y = number of adult x + y = 250 3.50x + 7.00y = 1347.50 solve these two equations together and solve for x and y
January 13, 2011

Math
see your post below for answer and you need more help, post back I gave you the equations below, with the answer
January 13, 2011

Math ---Helper
thanks, I'll look, but I am not the best tutor here, I am not even a tutor--just a helper
January 13, 2011

Necessary Math HELp
correct, the answer is (-4, 3)
January 13, 2011

Necessary Math HELp
2x + y = -5 3x +5y = 3 to solve 2 equations simultaneously (at the same time), by elimination, the object is to get rid of one variable. adding a negative to a positive equals zero, for example, 5y + -5y = 0. So, to get rid of y in the above 1st equation, since the first ...
January 13, 2011

algebra
see 1st link below under related questions
January 13, 2011

math
see post above or look at answer to the 1st time you posted this below
January 13, 2011

Math
x = number of cars y = number of motorcycles 4x = number of tires for cars 2y = number of tires for motorcycles x + y = 500 4x + 2y = 1650 solve together you should get 325 cars 175 motorcycles
January 13, 2011

MATHH
you're welcome
January 13, 2011

MATHH
(1) 7x - 2y =3 (2) 2x + y = 4 look to see which variable is easier to get rid of. since the first equation has -2y, multiple the 2nd equation by 2, so that you get 2y. -2y + 2y = 0, so you will have eliminated the y variable Multiple (2) by 2 2 (2x + y = 4) = 4x + 2y = 8 Add ...
January 13, 2011

math helpy
16^(-3/4) = 1/(16^3/4) = 1/(4th root 16)^3 = 1/(2)^3 = 1/8
January 13, 2011

MATH
to Eliminate x x - y = -1 3x + 5y = 21 multiply (x - y = -1) by -3 -3x + 3y = 3 3x + 5y = 21 add both equations 0 + 8y = 24 8y = 24 y = 3
January 13, 2011

Math
if you split a 90 deg angle into two angles and one of the angles is 30 deg 90 - 30 = the other angle 90 - 30 = ?
January 13, 2011

Algebra
xz = 48 yz = 72 xy = 24 x = 4, y = 6, z = 12 x + y + z = 4 + 6 + 12 = 22 I did this manually, by trial an error there must be an easier way ? I am not a tutor maybe a tutor will answer with an easier way
January 13, 2011

Math
log(x+1) 27=3 since, logb N = x b^x = N this can be written as (x + 1)^3 = 27 take cube root of each side x + 1 = 3 x = 2
January 13, 2011

math
2/4 = 1/2 1/2 * 24 = ?
January 13, 2011

Equations
correct
January 13, 2011

Equations
correct
January 13, 2011

8th grade Math
look at the first entry in the table if x = - 4, y = 4 now look at each rule 1st rule says, that y = -x ( y equals the neg of x) 2nd rule says, y = -4 (the value for y is -4) 3rd rule says y = 2x (y is two times the value of x) 4th rule y = x (y and x are the same) since if x...
January 13, 2011

Math
this is something that YOU need to do
January 13, 2011

math
check you problem, I think you typed it here wrong what is the exponent, -8 ?
January 13, 2011

Math
75% = .75 .75 * 60 = ?
January 13, 2011

Stupid Algebra
13a squared times b do you mean 13a^2 * b ? have no idea what you mean by this (-4a cubed b cubed c) and what do you need to do? multiply (13a^2 * b) times ???
January 13, 2011

algebra
not following what you need
January 13, 2011

algebra
if you are dividing by 8x, you have to do polynomial long division give it a try
January 13, 2011

algebra
48x^9 - 24x^3 = 40x divide by what ? I have no idea what the 8x is you can't just type out a bunch of numbers and say divide example, you should write 3x^2 + 2 divided by 5 this is clear
January 13, 2011

algebra
not clear what you are dividing
January 13, 2011

algebra
plug 2 in as x and solve -3x^3 + 7x^2 - 3x -2 -3(2)^3 + 7(2)^2 - 3(2) - 2 -3(8) + 7(4) - 6 - 2 = ?
January 13, 2011

Algebre=Please check
1st one is correct 2nd one - including point ?, you are missing part of the point repost and I'll check
January 13, 2011

binomials math
(2x-1)^5 32x^5 - 80x^4 + 80x^3 - 40x^2 + 10x - 1 (x+3y)^3 x^3 + 9x^2y + 27xy^2 + 27y^3
January 13, 2011

math
2x^2-x-3=0 (x + 1 )(2x - 3) x = - 1, x = 3/2
January 13, 2011

math
x^2 + 5x + 6 = 0 factors of 6, 2 x 3 = 6 6 x 1 = 6 factors of 6 that add to 5 2 + 3 = 5 6 + 1 = 7 Since, 2 x 3 = 6 AND 2 + 3 = 5 x^2 + 5x +6 = (x + 2)(x + 3) ( x + 2 ) = 0 x = - 2 (x + 3)= 0 x = -3
January 13, 2011

math
81r^2 - 36rs + 4s^2 this one is a little harder than the above one I did for you (9r - 2s)(9r - 2s) = (9r - 2s)^2 this is factored form.
January 13, 2011

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