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April 18, 2014

Homework Help: Math: Arithmetic

Recent Homework Questions About Arithmetic

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math
The 6th term of an arithmetic sequence is x while the 11th is y find the 1st 2 terms
Sunday, January 20, 2013 at 9:04am

phisics
After doing all the calculations below, I just realized you just needed a scale drawing. Oh, well, no harm done Get a nice sheet of graph paper, scale the units to the following 150 m --> 15/2 = 7.5 cm 270 m --> 27/2 = 13.5 cm 280 m --> 28/2 = 14 cm , to fit on a ...
Sunday, January 20, 2013 at 1:36am

algebra 1
number of 3-digit numbers : 999-99 = 900 multiples of 5: 5, 10, 15, ... , 995 ---> 199 of them prob(multiple of 5) = 199/900 divisible by 2 --- > must be even numbers are : 100, 102, 104, ... 998 ----> 445 of them prob(even) = 445/900 = 89/180 numbers which when ...
Friday, January 18, 2013 at 12:32pm

Algebra
Is the series 72, 48, 32,... an arithmetic or geometric series. WHat is common difference or ratio
Thursday, January 17, 2013 at 4:10pm

arithmetic
Divide the numerator by the denominator. 12/23 = 0.5217 = 0.52
Wednesday, January 16, 2013 at 4:46pm

arithmetic
change 12/23 into a decimal to the nearest hundreth's
Wednesday, January 16, 2013 at 4:42pm

arithmetic
not
Monday, January 14, 2013 at 7:05pm

arithmetic
they dont tell me anything so should i or not?
Monday, January 14, 2013 at 7:01pm

arithmetic
Not unless your directions tell you to do so.
Monday, January 14, 2013 at 6:58pm

arithmetic
i got 62.5 words/ minute should i round 62.5?
Monday, January 14, 2013 at 6:56pm

arithmetic
Divide 500 by 8. You'll get the number of words per minute (WPM).
Monday, January 14, 2013 at 6:55pm

arithmetic
500 words / 8 minutes whats the unit rate
Monday, January 14, 2013 at 6:53pm

arithmetic
12:00 = 11:60 11:60 - 9:20 = 2:40 so 2:40 from 9:20 to noon add 5:05 now 2:40 + 5:05 = 7:45 hours from 9:20 am to 5:05 pm
Monday, January 14, 2013 at 6:43pm

arithmetic
Using math to fine 9:20 am to 5:05 pm
Monday, January 14, 2013 at 6:21pm

Remainder Theorem
f(x) divided by x-2 leaves remainder of 2 ---> f(2) = 2 f(x) divided by x-1 leaves a remainder of -2 --> f(1) = -2 f(2) = 8a + 4b + 6 - 4 = 2 8a + 4b = 0 2a + b = 0 f(1) = a + b + 3-4 = -2 a + b = -1 subtract them: a = 1 back in a+b=-1 1+b = -1 b = -2 a = 1 , b = -2 ...
Sunday, January 13, 2013 at 10:30pm

Math
number of tomatoes --- x number of peppers ---- y number of eggplants --- z x+y+z = 81 (#1) 35x + 20y + 30z = 2185 or 7x + 4y + 6z = 437 (#2) x+y = (1/2)z 2x + 2y = z (#3) plug #3 into #1 x+y+2x+2y=81 3x + 3y=81 x+y = 27 --- or y = 27-x ---- #4 plug #3 into #2 7x + 4y + 6(2x+...
Sunday, January 13, 2013 at 9:06am

Math
Is there a way to find the term number of a sum in an arithmetic series? Like if you had the sum of the first 12 terms in a series could you find the term value of term 12 using the sum? For example in one of my previous questions : For each series, calculate t12 and S12 a) 37...
Saturday, January 12, 2013 at 4:57pm

Math
Determine the sum of the first 20 terms of the arithmetic sequence in which ... f) the 7th term is 43 and the 13th term is 109 I know you can make two equations : 43 = a + 6d and 109 = a + 12 d And subtract them to get d = 11 But I know there's another way to get d, that ...
Saturday, January 12, 2013 at 4:51pm

Math
Oh. I guess the point of the question was for you to find t12 first by using the general formula so that you could have the last term, which would allow us to use the simpler arithmetic series formula, i.e., n(t1+tn)/2 rather than n/2(2a+(n-1)d) But I'd still like to know ...
Saturday, January 12, 2013 at 3:09pm

trigonometry
if we indicate a path by (r,Ø) , where r is the distance and Ø is the direction measured counterclockwise from 0 at the normal position then in component form (rcosØ,rsinØ we have (15,S W40°10' W) = (15,229°50') = (-9.6752, -11.46257...
Thursday, January 10, 2013 at 8:20am

math
term given by x+2,3x-1,and 4x-1 form an arithmetic sequence. find the value of x. i didn't get it how to start this question and how it forms arithmetic sequence?
Wednesday, January 9, 2013 at 6:58pm

Math
think of an arithmetic sequence where a=60 and d=1. The sum of the 1st 21 terms is thus 21/2(2*60+20*1) = 1470 or, since each number is 20 more than the terms of the first sequence, add 21*20 = 400, to get 1470
Wednesday, January 9, 2013 at 11:03am

MAth
The seat count forms an arithmetic sequence 25,27,29... where a = 25, d=2 The sum of the 1st 20 terms is thus S20 = 20/2 (2*25 + 19*2) = 880
Wednesday, January 9, 2013 at 10:58am

Math
Consecutive numbers of an arithmetic have a common difference between them, that is ... y - 3.6 = 8.2-y 2y = 11.8 y = 5.9 or y must be "average" of the two other numbers y = (3.6+8.2)/2 = 5.9 You sure went about it the long way. For splacing 3 evenly spaced numbers ...
Tuesday, January 8, 2013 at 7:28pm

Math
I'm learning series and sequences (grade 11). Please check that my steps show I understand what I'm doing/the concept and my answer as well: 5. The consecutive terms of an arithmetic sequences are 3.6, y, 8.2. Find the value of y. This seems to be a sequence question ...
Tuesday, January 8, 2013 at 6:02pm

arithmetic progression
use the first two facts to find d,a1 Sn=n/2(2a1+(n-1)d) you will have two unknowns, two equations. then, find s34
Tuesday, January 8, 2013 at 9:35am

arithmetic progression
If sum of first 21 terms of an arithmetic progression is 13 and that of first 13 terms is 21, show that sum of first 34 terms is -34 ?
Tuesday, January 8, 2013 at 9:28am

math
How will I know the equation of a sequence if it is not arithmetic nor geometric sequence?
Saturday, January 5, 2013 at 5:53pm

SeQuEnCeS and SeRiEs: HELP PLZ!
The first three terms of the sequence -8,x,y,72... form an arithmetic sequence, while the second, third and fourth terms form a geometric sequence. Determine x and y.
Friday, January 4, 2013 at 2:19pm

Math need help!
Study this site carefully. Learn how to calculate mean, median, mode and range. http://www.purplemath.com/modules/meanmo​de.htm From there it's simple arithmetic.
Friday, January 4, 2013 at 1:05pm

Can someone help me?!
The arithmetic sequence could be, and is, 12,15,18,21,24,27,30,33,36,39, 42,45,48,51,54,57,60,63,66,69,72 The A1, A5 and A13 terms are 12, 24 and 48. Note that they have the common ratio 2, as required. The geometric sequence is 12, 24, 36, 72, 144, 288, 576, 1152, 2304, 4608...
Thursday, January 3, 2013 at 6:32pm

Can someone help me?!
The 1st, 5th and 13th terms of an arithmetic sequence are the first three terms of a geometric sequence with a common ratio 2. If the 21st term of the arithmetic sequence is 72, calculate the sum of the first 10 terms of the geometric sequence.
Thursday, January 3, 2013 at 6:06pm

math help!
Let a = first term, T1 Let b = Tn+1 - Tn = term difference a + 9b = 34 S20 = T1 + T2 + ...T19 + T20 = a + (a+b) + (a+2b) + ...(1+19b) 20a + (b)(1+2+3+...19) = 20 a + 190 b = 710 20a + 180b = 680 10 b = 30 b = 3 a = 34 -27 = 7 Arithmetic Series is 7, 10, 13, 16, 19, 22, 25, 28...
Wednesday, January 2, 2013 at 10:06am

math
first term of the arithmetic sequence is 13. two other terms of the sequence are 37 and 73. common difference is consecutive terms integers. determine all possible values for 100th term.
Wednesday, January 2, 2013 at 12:35am

math help!
the 10th term is 34 of arithmetic series and the sum of the 20th term is 710 i.e S20=710.what is the 25th term?
Tuesday, January 1, 2013 at 11:34pm

math
the 10th term is 34 of arithmetic series and the sum of the 20th term is 710.what is the 25th term?
Tuesday, January 1, 2013 at 11:11pm

math
using your arithmetic sequence definitions t1 = a = 5 t20 = a+19d = 62 5+19d = 62 19d = 57 d = 3 sum(20) = (20/2)(first + last) = 10(5+62) = 670
Tuesday, January 1, 2013 at 8:03pm

math
t11=19 and t17=61.then what will be S12? arithmetic series question
Tuesday, January 1, 2013 at 6:27pm

math
Hi, first thing you do is to want to find Formulas formulas formulas. hey, this is a arithmetic sequence! An arithmetic sequence is A series such as 3 + 7 + 11 + 15 + ··· + 99 or 10 + 20 + 30 + ··· + 1000 which has a constant ...
Tuesday, January 1, 2013 at 4:53pm

math help!
odd that it would come from the arithmetic and geometric sequence chapter, unless it is an example of a sequence which is neither.
Monday, December 31, 2012 at 12:07am

math help!
Its from arithmetic and geometric sequence chapter.....and what you wrote is not correct.
Sunday, December 30, 2012 at 11:26pm

math
specifically, this would be an arithmetic sequence, where the difference between terms is a constant, in this case 2/6, or 1/3.
Thursday, December 27, 2012 at 11:09pm

maths-Arithmetic progression
you will recall that n ∑ k^2 = n(n+1)(2n+1)/6 k=1 it's pretty obvious then what the average is
Thursday, December 27, 2012 at 12:01pm

maths-Arithmetic progression
Prove that mean of squares of first n natural numbers is (n+1)(2n+1)/6
Thursday, December 27, 2012 at 11:26am

math-Arithmetic progression
The number of rungs is eleven. Measured from the bottom rung up, their vertical distances are 0, 0.25, 0.50, 0.75, 1.0. 1.25, 1.50, 1.75, 2.00, 2.25 and 2.50 meters. Rung length increases from 45 at the bottom to 25 at the top, so rung lengths are: 45, 43, 41, 39, 37, 35, 33, ...
Wednesday, December 26, 2012 at 7:33am

maths-Arithmetic progression
A ladder has rungs 25 cm apart.The rungs decrease uniformly in length from 45 cm at the bottom to 25 cm at the top.If the top and the botom rungs are two nd a half metre apart, what is the length of the wood required for the rungs
Wednesday, December 26, 2012 at 7:22am

Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...
Sunday, December 23, 2012 at 11:14pm

Alegbra
Suppose the modified quota is 2.77. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...
Sunday, December 23, 2012 at 7:14pm

Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...
Sunday, December 23, 2012 at 6:11pm

Math *URGENT
Please give the answers and solutions for each. 1.If the second term is 2 and the seventh term of a geometric sequence is 64, find the 12th term. 2. Which term if the geometric sequence 18,54,162,486,... is 3,188,646? 3. Determine the geometric mean of 8 and 288 4.Find x if ...
Thursday, December 20, 2012 at 9:37pm

math
You get .01 for the first day, .02 for the second, then keep doubling. However, they might fire you after the first dozen days or so. It is a logarithmic progression in contrast to the second, which is an arithmetic progression. 1 + 2^30 = ? In currency terms = .01 + .02 + .04...
Tuesday, December 18, 2012 at 12:43pm

math To MS.SUE
I wouldn't worry much about missing one problem because of a minor error. Many very smart engineers and mathematicians make minor errors. My son, now with a masters in engineering from Stanford, didn't ace all of his high and middle school tests because he usually made...
Sunday, December 16, 2012 at 4:58pm

Stat
Look up a normal distribution table, such as: http://www.math.unb.ca/~knight/utility/N​ormTble.htm Look up P(Z<2.35), which gives you 0.9906. We now need to subtract P(Z<-1.5) to get P(-1.5<Z<2.35). For this, we need to make use of the fact that the normal ...
Friday, December 14, 2012 at 1:19pm

Math - Arithmetic Sequences
The third term of an arithmetic sequence is 15, and the fifth term is 37. What is the first term?
Tuesday, December 11, 2012 at 9:02pm

Math
This is simple arithmetic. 5 * 13 = ______ inches
Monday, December 10, 2012 at 4:06pm

math
her speed on flat ground --- x mph effect of hill -------------- y mph (11/60)((x+y) = 4.8 11x + 11y = 288 (14/60)(x-y) = 4.8 14x - 14y = 288 1st time 14 ---> 164x + 154y = 4032 2nd times 11 --> 154x - 154y = 3168 add them 318x = 7200 x = 22.64 sub into 11x + 11y = 288 ...
Sunday, December 9, 2012 at 10:03pm

hi
What is the sixth term of the arithmetic sequence if the 10th term is 33 and the 15th term is 53.
Sunday, December 9, 2012 at 6:36am

pre calculus
Draw a cross-section of the ends of the cylinder The level of gas will form a segment of the circle, the chord being .5 ft from the centre of the circle. Volume = area of segment x 8 to find the area of the segment, you can use formulas found in several websites, or just find ...
Saturday, December 8, 2012 at 12:57pm

Calculus
with radius r and height h, pi r^2 h + 2/3 pi r^3 = v so, h = 3(v - pi r^2)/(2pi r^3) a = pi r^2 + 2pi r h + 2pi r^2 = 3pi r^2 + 2pi r h = 3pi r^2 + 3(v - pi r^2)/r^2 = 3pi r^2 - 3pi + 3v/r^2 da/dr = 6pi r - 6v/r^3 dv/dr = 0 when r^4 = v/pi a(∜(v/pi)) = 3pi√(v/pi...
Thursday, December 6, 2012 at 10:28pm

maths-probability
number of arrangements without restriction = 9!/2 = 181440 (There were 2 N's, so we divide by 2!) We have 3 vowels, we don't want any 2 to be beside each other. so consider the possible pairs. IU IA UA UI AI AU , that is there are 6 of the, or P(3,2) So if we consider ...
Thursday, December 6, 2012 at 8:39am

trigonometry
[3/4(cos pi/3 + i sin pi/3)][4(cos 3pi/4 + i sin 3pi/4)] = (3/4)(1/2 + i (√3/2) (4) (-√2/2 + i √2/2) = (3/4)(1/2)(1 + i √3)(4)(1/2)( -√2 + i √2) = (3/4)(-√2 + i√2 - i √6 + √6 i^2) = (3/4) (-√2 -√6 + i(&#...
Monday, December 3, 2012 at 11:09pm

maths
the sum of first 8 terms of an arithmetic progression is 156.the ratio of its 12th term to its 68th term is 1:5.calculate the first term and the fifteenth term. please help this questions please.
Monday, December 3, 2012 at 6:16am

solid mensuration
make a sketch, putting the complete figure on the x-y grid draw a line from the centre of the semicircle to the vertex of the square , calling that point P(x,y) so the base of the square is 2x and its height is y so clearly y = 2x also x^2 + y^2 = 15^2 x^2 + (2x)^2 = 225 5x^2...
Saturday, December 1, 2012 at 9:38am

Math (Calculus)
puzzled, why would your write the point as (1 , -1/-8) and not as simply (1 , 1/8) ? first expand it y = x^7 - 2x - 9x^6 y + 18y 0 = x^7 - 2x - 9x^6 y + 17y 0 = 7x^6 - 2 - 9x^6 dy/dx - 54x^5y + 17dy/dx dy/dx(17 - 9x^6) = 54x^5y - 7x^6 dy/dx = (54x^5y - 7x^6))/(17 - 9x^6) at x...
Friday, November 30, 2012 at 7:00pm

physics
Rball = .07 meter KE = (1/2) m v^2 + (1/2)I w^2 I = (2/5) m r^2 v = w Rball = .07 w so Ke = (1/2) m (.07 w)^2 + (2/5) m .07^2 w^2 = m (9/10) (.0049) w^2 = .00441 m w^2 Change in Pe down ramp = m g h = m(9.81)(.57) = .55917 m Ke = change in Pe .55917 m = .00441 m w^2 w^2 = 127 ...
Friday, November 30, 2012 at 2:17pm

maths
perimeter of square = 4(11) = 44 let the radius of the cylinder be r 2πr = 44 r = 22/π vol of cyl = πr^2 h π(484/π^2)(h) = 98π 484h/π = 98π h = 98π^2/484 = appr 7.74 check my arithmetic
Friday, November 30, 2012 at 8:49am

AP Physics B
potential energy lost in fall = potential energy gained by our perfect cord m g (fall distance) = (1/2) k (stretch distance)^2 63.6(9.81)(fall) = (1/2)(67.8)(fall-9.54)^2 623.9 f = 33.9 (f-9.54)^2 18.4 f = f^2 - 19.1 f + 91.0 f^2 - 19.1 f + 72.6 = 0 f = [ 19.1 +/- sqrt (365 - ...
Thursday, November 29, 2012 at 4:04pm

CALCULUS
The masses of 10 books are found to be in an arithmetic sequence. If their total mass is 13 kg and the lightest book has a mass of 400 grams, what is the mass of the heaviest book? 2,000 grams 2,100 grams 2,200 grams 2,300 grams 2,700 grams
Tuesday, November 27, 2012 at 11:07am

arithmetic
ANSWER: 65 Substitute 30 into n: 7 + (30 - 1) x 2 7 + (29) x 2 7 + 58 = 65
Saturday, November 24, 2012 at 3:37pm

precalculus
The sum of the members of a arithmetic progression : Sn = ( n / 2 ) * [ 2 a1 + ( n - 1 ) * d ] d = common difference of successive members of arithmetic progression In this case : S1 = ( 1 / 2 ) * [ 2 * 2 + ( 1 - 1 ) * 3 ] S1 = ( 1 / 2 ) * (4 + 0 * 3 ) S1 = ( 1 / 2 ) * 4 = 2 ...
Thursday, November 22, 2012 at 2:55am

Chemistry
Use van der Waals’ equation to calculate the pressure exerted by 2.33 mol of ammo- nia at −3.7◦C in a 1.25 L container. The van der Waals’ constants for ammonia are a = 4.00 L2·atm/mol2 and b = 0.0400 L/mol. (The values for a and b have been ...
Tuesday, November 20, 2012 at 6:57pm

arithmetic
8/10 = 0.8
Monday, November 19, 2012 at 2:16pm

arithmetic
Write 8tenth with common fraction and decimal fraction
Monday, November 19, 2012 at 2:15pm

Math
http://www.mathwarehouse.com/arithmetic/​numbers/prime-number/prime-factorization​.php?number=108#primeFactorization
Saturday, November 17, 2012 at 10:12pm

arithmetic
3.14 * 0.88 = ?
Thursday, November 15, 2012 at 6:02pm

arithmetic
If you have 3.14 lbs of a food and it costs .88 a lbs. then how much money would that 3.14 cost?
Thursday, November 15, 2012 at 5:54pm

math
What is the sum of a 22–term arithmetic sequence where the first term is 56 and the last term is –28
Wednesday, November 14, 2012 at 5:24pm

calculus
let each side of the equilateral triangle be 2x let each side of the square be y then 6x + 4y = 5 y = (5-6x)/4 Area of triangle: draw in the altiude, so we have a right angled triangle with hypotenuse 2x and base 1x, by Pythagorus the height is √3x (now do you see why I ...
Wednesday, November 14, 2012 at 10:00am

arithmetic
- 9 + 2 = 2 + (-9) -7= -7
Wednesday, November 14, 2012 at 12:25am

arithmetic
does -9 + 2 equal 2 + (-9)?justify your answer.
Wednesday, November 14, 2012 at 12:21am

7th grade math
your question makes no sense. You have an equation made up of -9 on the left and an arithmetic calculation on the right side the calcuation on the right is correct as 50 so you end up with saying -9 = 50 , which of course is nonsense.
Monday, November 12, 2012 at 11:30pm

math
I can come up with a cubic polynomial that fits the data, but somehow I don't think that's what you're after. Are you just given a table like 0 1 1 4 2 13 3 27 and asked to come up with a rule? It's not an arithmetic or geometric sequence, so it seems a bit ...
Monday, November 12, 2012 at 5:07pm

college algebra
Write the arithmetic sequence 16,20,24,28,in the standard form: An.....?
Monday, November 12, 2012 at 1:08pm

Tracy , Many's answer not valid - algebra
Sorry Many, but there two major flaws with your answer. 1. You are using simple interest, but mortgages are based on compound interest 2. You can't just multiply the first year's interest times 20 and 30. Are there no payments made? If payments are made then the annual...
Wednesday, November 7, 2012 at 10:36pm

arithmetic
Amanda is making xookies for a charity event. She expects 10 people to come. She wants to have 3 cookies for each person. How can Amanda use a patter to find the product for 6 x 10?
Tuesday, November 6, 2012 at 7:01pm

math
let AD = DC = x then AB = 2x in triangle ABC , angle B = angle C =Ø in triangle BCD , angle C = angle BDC = Ø 2 angles of one are equal to 2 angles of the other, so they are similar then: 2/x = 2x/2 2x^2 = 4 x^2=2 x=√2 So triangle ABC has equal sides of 2&#...
Monday, November 5, 2012 at 7:54am

arithmetic
First, you have to find the least common multiple of the number of days between eggs (2,3,4) to get 30. Then, you make a list of numbers 1-30: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Sunday, November 4, 2012 at 5:34pm

math
http://www.youtube.com/watch?v=yXiG2iv1V​q8 http://www.math.com/school/subject1/less​ons/S1U4L6GL.html http://www.khanacademy.org/math/arithmet​ic/fractions/v/subtracting-mixed-numbers​
Saturday, November 3, 2012 at 2:10pm

calculus
radius of water level --- r height of water level --- h by ratio: r/h = 6/8 8r= 6h r = 3h/5 V = (1/3)πr^2 h = (1/3)π(9h^2/25)(h) =3/25)πh^3 dV/dt = (9/25)π h^2 dh/dt given: when h = 5 , dV/dt = 10 10 = (9/25)π (25) dh/dt dh/dt = 10/(9π) check my ...
Saturday, November 3, 2012 at 8:34am

arithmetic
IT IS CORRECT!
Thursday, November 1, 2012 at 5:44pm

math
Find the sum of the first 33 terms of the arithmetic sequence whose first term is 3 and whose 33rd term is -253
Tuesday, October 30, 2012 at 1:12pm

Calculus
Major arithmetic mess. After making quick sketch, it was easy to see that all 3 graphs intersect at (1,6) the sine curve and the parabola also intersect at (2,0) and the straight line intersects the parabola at (3.5 , 13.5) The straight line also intersects the curve at appr ....
Saturday, October 27, 2012 at 9:23am

Calculus
I assume you made a sketch. You should have the two graphs intersecting at (0.0) and (16,4) So we will washer discs with outer ratius of 4 - x/4 and inner radius of 4 - √x area of washer disc = π(4-x/4)^2 = π(4-√x)^2 = π(16 - 2x + x^2/4 - (16 - 8&#...
Saturday, October 27, 2012 at 12:05am

Algebra 2
Determine if the sequence is arithmetic, geometric, or neither. If it is arithmetic or geometric, write a rule. 4,1,0,1,4 My answer: Neither (-2)^2 (-1)^2 0^2 1^2 2^2 Is it correct?
Friday, October 26, 2012 at 4:13pm

math
Adding and subtracting negative numbers seems confusing to you. Study these sites. http://www.mathsisfun.com/positive-negat​ive-integers.html http://www.khanacademy.org/math/arithmet​ic/addition-subtraction/v/adding-negativ​e-numbers
Thursday, October 25, 2012 at 10:58pm

math
to be multiples of 4 and 6, they must be multiples of 12, the LCM The smallest 3-digit multiple of 12 is 108 , then 120 , 132 .. .996 consider this to be an arithmetic sequence a = 108, d = 12 , n = ? -- the number of terms t(n) = a + (n-1)d 996 = 108 + 12(n-1) 888 = 12n - 24 ...
Thursday, October 25, 2012 at 7:28pm

math
http://www.mathsisfun.com/positive-negat​ive-integers.html http://www.khanacademy.org/math/arithmet​ic/addition-subtraction/v/adding-subtrac​ting-negative-numbers
Wednesday, October 24, 2012 at 7:30pm

arithmetic
If the number of marbles in the red box are x, then those in the blue box would be 5x. 5x - x = 24 Solve for x, then 5 x.
Wednesday, October 24, 2012 at 4:33am

arithmetic
If a blue box has 5 times as many marbles as a red box and the blue box has 24 more marbles than the red box how many marbles are in each box?
Tuesday, October 23, 2012 at 10:47pm

Math
1.75 inches --- 50 miles 1 inch ----50/1.75 miles 7 inches --- 7(50/1.75) miles = 200 miles or ... just use a ratio x/50 = 7/1.75 times 50 x = 50(7)/1.75 = 200 (notice both methods end up with the same arithmetic calculations)
Tuesday, October 23, 2012 at 10:16am

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