Thursday

April 24, 2014

April 24, 2014

Total # Posts: 1,699

**math**

0.5x + 2 = 0.2x - 7 subtract 0.2x from both sides 0.3x + 2 = -7 0.3x = -9 x = -30

**algebra**

uã6w^3 + wã96wu^2 6w^2 au (w + 16u)

**math**

15% = .15 .15 * 100 = ?

**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 = ?

**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 = ?

**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 c...

**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

**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

**algebra**

1 < 3x+5 < 12 -4 < 3x < 7 -4/3 < x < 7/3

**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

**Geometry**

Area = s^2 A = 8^2 A = ?

**algebra**

you need to use brackets to show what is under the radical

**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

**math**

are you missing something 16x + 13z = ?

**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)

**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

**college math 209**

u - 18 = 2 u = 20

**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

**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

**ALGEBRA**

the rate is 15%

**6th grade math**

yes, you are correct

**statistics**

question? you are missing part of the problem

**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

**math**

want do you need to find? this problem is not complete

**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 substitut...

**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 ...

**algebra 2**

ln(e^18x) = 9 Since, ln e^x = x ln e^18x = 18x 18x = 9 x = 2

**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 ?

**mgt**

who is "her" ?

**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 st...

**math**

you're welcome

**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

**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,...

**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 20,0...

**algebra**

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

**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)

**Algrebra II-please check my answer**

1. (-9/7, 0) you are correct 2. correct, but should be written as 2 <= x <= 8

**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 ...

**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 ...

**algebra**

yes, you are correct

**geometry**

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

**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 c...

**Algebra**

see you post below, I showed you there

**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 ...

**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

**8th grade math**

not enough info to solve this,

**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 multi...

**Pre-Calculus**

I think the tutors like you to post each problem as a separate post.

**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 differenc...

**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 ...

**4th grade**

you have to post the question you need help with

**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.

**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 ...

**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 dimension...

**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?

**Geometry**

so, this means that you cannot have two obtuse angles

**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

**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

**To Helper**

you're welcome

**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 coi...

**3rd grade math**

this is answered above. see your 2nd post of this

**3rd grade math**

answered above in your 2nd post

**MAATH**

Ax + By = C x + 3y = 1 is in this form already 2x + 4y - 12 = 0 2x + 4y = 12

**math**

x/3 * 5/8 = 5/12 5x/24 = 5/12 cross multiply 60x = 120 x = ?

**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

**Math**

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

**Math ---Helper**

thanks, I'll look, but I am not the best tutor here, I am not even a tutor--just a helper

**Necessary Math HELp**

correct, the answer is (-4, 3)

**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 equat...

**algebra**

see 1st link below under related questions

**math**

see post above or look at answer to the 1st time you posted this below

**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

**MATHH**

you're welcome

**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 t...

**math helpy**

16^(-3/4) = 1/(16^3/4) = 1/(4th root 16)^3 = 1/(2)^3 = 1/8

**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

**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 = ?

**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

**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

**math**

2/4 = 1/2 1/2 * 24 = ?

**Equations**

correct

**Equations**

correct

**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 ...

**Math**

this is something that YOU need to do

**math**

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

**Math**

75% = .75 .75 * 60 = ?

**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 ???

**algebra**

not following what you need

**algebra**

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

**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

**algebra**

not clear what you are dividing

**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 = ?

**Algebre=Please check**

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

**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

**math**

2x^2-x-3=0 (x + 1 )(2x - 3) x = - 1, x = 3/2

**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

**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.

**math**

you try, see above example that I did for you. you won't learn how to factor without trying post back where you are stuck

**Math**

2. (3,-2), (6,1) The equation of the straight line passing through the points (x1, y1) and (x2, y2), y - y1 = (y2 - y1)/(x2 - x1)* (x -x1) y - -2 = (1 - -2)/(6 - -2)* (x - 3) y + 2 = 3/8 (x - 3) y = mx + b y + 2 = 3/8 (x - 3) solve for y 8y + 16 = 3(x -3) 8y + 16 = 3x - 9 y = ...

**Algebra**

x = loan at 2.8%, y = loan at 4.5% 0.028x + 0.045y = 1024.40 x + y = 31000 solve these two equations together for your answer post back if you need help

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